commit e062317ce4af5f5731dbc2f3c909534195191c71
Author: admin <liuyu65@126.com>
Date:   Mon Aug 10 22:24:17 2026 +0800

    first commit

diff --git a/ChartAnalysis.exe b/ChartAnalysis.exe
new file mode 100644
index 0000000..543f0ba
Binary files /dev/null and b/ChartAnalysis.exe differ
diff --git a/Program.cs b/Program.cs
new file mode 100644
index 0000000..7870e44
--- /dev/null
+++ b/Program.cs
@@ -0,0 +1,2951 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.IO;
+using System.Reflection;
+using System.Text;
+using System.Threading;
+using System.Windows.Forms;
+using System.Windows.Forms.DataVisualization.Charting;
+using MySqlConnector;
+
+namespace MysqlChart
+{
+    static class Program
+    {
+        [STAThread]
+        static void Main()
+        {
+            AppDomain.CurrentDomain.AssemblyResolve += OnAssemblyResolve;
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            if (HasArg("--selftest"))
+            {
+                SelfTest();
+                return;
+            }
+            if (HasArg("--drawtest"))
+            {
+                MainForm mf = new MainForm();
+                mf.Show();
+                Application.DoEvents();
+                mf.RunDrawTest();
+                Application.DoEvents();
+                Thread.Sleep(2000);
+                return;
+            }
+            Application.Run(new MainForm());
+        }
+
+        static bool HasArg(string name)
+        {
+            string[] args = Environment.GetCommandLineArgs();
+            foreach (string a in args)
+                if (a.Equals(name, StringComparison.OrdinalIgnoreCase)) return true;
+            return false;
+        }
+
+        static void SelfTest()
+        {
+            StringBuilder log = new StringBuilder();
+            try
+            {
+                string configPath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "config.ini");
+                ConfigData config = ConfigData.Load(configPath);
+                log.AppendLine("config: host=" + config.Host + " db=" + config.Database);
+                MySqlConnectionStringBuilder b = new MySqlConnectionStringBuilder();
+                b.Server = config.Host;
+                b.Port = uint.Parse(config.Port);
+                b.UserID = config.User;
+                b.Password = config.Password;
+                b.Database = config.Database;
+                b.CharacterSet = config.Charset;
+                b.ConnectionTimeout = 10;
+                using (MySqlConnection conn = new MySqlConnection(b.ConnectionString))
+                {
+                    conn.Open();
+                    log.AppendLine("1. 连接成功");
+                    List<string> tableList = new List<string>();
+                    using (MySqlCommand cmd = new MySqlCommand("SHOW TABLES", conn))
+                    using (IDataReader r = cmd.ExecuteReader())
+                    {
+                        while (r.Read()) tableList.Add(r.GetString(0));
+                        log.AppendLine("2. 表列表: " + string.Join(", ", tableList.ToArray()));
+                    }
+                    string table = "mixer_runtime";
+                    if (!tableList.Contains("mixer_runtime") && tableList.Count > 0) table = tableList[0];
+                    List<string> cols = new List<string>();
+                    using (MySqlCommand cmd = new MySqlCommand(
+                        "SELECT * FROM `" + table + "` LIMIT 0", conn))
+                    using (IDataReader r = cmd.ExecuteReader())
+                    {
+                        for (int i = 0; i < r.FieldCount; i++) cols.Add(r.GetName(i));
+                        log.AppendLine("3. 列列表: " + string.Join(", ", cols.ToArray()));
+                    }
+                    string xc = cols.Count > 0 ? cols[0] : "1";
+                    string yc = cols.Count > 1 ? cols[1] : xc;
+                    string qx = "`" + xc.Replace("`", "``") + "`";
+                    string qy = "`" + yc.Replace("`", "``") + "`";
+                    using (MySqlCommand cmd = new MySqlCommand(
+                        "SELECT " + qx + ", " + qy + " FROM `" + table + "` ORDER BY " + qx + " ASC LIMIT 100", conn))
+                    using (IDataReader r = cmd.ExecuteReader())
+                    {
+                        int count = 0;
+                        object[] first = null;
+                        object[] last = null;
+                        while (r.Read())
+                        {
+                            object[] vals = new object[r.FieldCount];
+                            r.GetValues(vals);
+                            if (first == null) first = vals;
+                            last = vals;
+                            count++;
+                        }
+                        log.AppendLine("4. 查询100行成功, 行数=" + count);
+                        if (first != null)
+                            log.AppendLine("   首行: x=" + first[0] + " y=" + first[1]);
+                        if (last != null)
+                            log.AppendLine("   末行: x=" + last[0] + " y=" + last[1]);
+                    }
+                    using (MySqlCommand cmd = new MySqlCommand(
+                        "SELECT COUNT(*) FROM `" + table + "`", conn))
+                    {
+                        object c = cmd.ExecuteScalar();
+                        log.AppendLine("5. 全表行数: " + c);
+                    }
+                }
+                log.AppendLine("SELFTEST PASS");
+            }
+            catch (Exception ex)
+            {
+                log.AppendLine("SELFTEST FAIL: " + ex.Message);
+                log.AppendLine(ex.StackTrace);
+                try
+                {
+                    string configPath2 = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "config.ini");
+                    ConfigData cfg2 = ConfigData.Load(configPath2);
+                    MySqlConnectionStringBuilder b2 = new MySqlConnectionStringBuilder();
+                    b2.Server = cfg2.Host;
+                    b2.Port = uint.Parse(cfg2.Port);
+                    b2.UserID = cfg2.User;
+                    b2.Password = cfg2.Password;
+                    b2.CharacterSet = cfg2.Charset;
+                    b2.ConnectionTimeout = 10;
+                    using (MySqlConnection conn2 = new MySqlConnection(b2.ConnectionString))
+                    {
+                        conn2.Open();
+                        log.AppendLine("(无库连接成功, 服务器上数据库列表:)");
+                        using (MySqlCommand cmd = new MySqlCommand("SHOW DATABASES", conn2))
+                        using (IDataReader r = cmd.ExecuteReader())
+                        {
+                            while (r.Read()) log.AppendLine("  DB: " + r.GetString(0));
+                        }
+                    }
+                }
+                catch (Exception ex2)
+                {
+                    log.AppendLine("(无法列出数据库: " + ex2.Message + ")");
+                }
+            }
+            string outFile = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "selftest_result.txt");
+            File.WriteAllText(outFile, log.ToString(), new UTF8Encoding(false));
+        }
+
+        static Assembly OnAssemblyResolve(object sender, ResolveEventArgs args)
+        {
+            string simpleName = new AssemblyName(args.Name).Name;
+            string resName = simpleName + ".dll";
+            Assembly asm = Assembly.GetExecutingAssembly();
+            string[] names = asm.GetManifestResourceNames();
+            foreach (string n in names)
+            {
+                if (n.EndsWith(resName, StringComparison.OrdinalIgnoreCase))
+                {
+                    using (Stream s = asm.GetManifestResourceStream(n))
+                    {
+                        if (s == null) return null;
+                        byte[] buf = new byte[s.Length];
+                        s.Read(buf, 0, buf.Length);
+                        return Assembly.Load(buf);
+                    }
+                }
+            }
+            return null;
+        }
+    }
+
+    class ConfigData
+    {
+        public string Host = "127.0.0.1";
+        public string Port = "3306";
+        public string User = "root";
+        public string Password = "";
+        public string Database = "";
+        public string Charset = "utf8mb4";
+
+        public static ConfigData Load(string path)
+        {
+            ConfigData c = new ConfigData();
+            if (!File.Exists(path)) return c;
+            string[] lines = File.ReadAllLines(path, Encoding.UTF8);
+            bool inMysql = false;
+            foreach (string line in lines)
+            {
+                string t = line.Trim();
+                if (t.Length == 0 || t.StartsWith(";") || t.StartsWith("#")) continue;
+                if (t.StartsWith("[") && t.EndsWith("]"))
+                {
+                    inMysql = t.Equals("[mysql]", StringComparison.OrdinalIgnoreCase);
+                    continue;
+                }
+                if (!inMysql) continue;
+                int idx = t.IndexOf('=');
+                if (idx <= 0) continue;
+                string key = t.Substring(0, idx).Trim().ToLowerInvariant();
+                string val = t.Substring(idx + 1).Trim();
+                switch (key)
+                {
+                    case "host": c.Host = val; break;
+                    case "port": c.Port = val; break;
+                    case "user": c.User = val; break;
+                    case "password": c.Password = val; break;
+                    case "database": c.Database = val; break;
+                    case "charset": c.Charset = val; break;
+                }
+            }
+            return c;
+        }
+
+        public void Save(string path)
+        {
+            StringBuilder sb = new StringBuilder();
+            sb.AppendLine("[mysql]");
+            sb.AppendLine("host = " + Host);
+            sb.AppendLine("port = " + Port);
+            sb.AppendLine("user = " + User);
+            sb.AppendLine("password = " + Password);
+            sb.AppendLine("database = " + Database);
+            sb.AppendLine("charset = " + Charset);
+            File.WriteAllText(path, sb.ToString(), new UTF8Encoding(false));
+        }
+    }
+
+    class MainForm : Form
+    {
+        ConfigData config;
+        string configPath;
+
+        TextBox txtHost, txtPort, txtUser, txtPassword;
+        ComboBox cmbDatabase, cmbTable, cmbX, cmbXType, cmbOrder, cmbCalc, cmbCalcTarget;
+        TextBox txtLimit, txtOffset, txtTailOffset, txtCalcParam;
+        Label lblCalcParam;
+        ListBox lbY;
+        DataGridView dgvFilter;
+        Button btnConnect, btnAddRule, btnDelRule, btnPlot, btnClear, btnSave;
+        Button btnCollapse, btnPin, btnExpand, btnApplyCalc, btnClearCalc, btnLegend, btnSettings, btnCross;
+        Label lblChartTitle, lblStatus;
+        Chart chart;
+        Panel left, right, splitterRef;
+
+        List<string> allColumns = new List<string>();
+        List<string> calcSeriesNames = new List<string>();
+        List<object[]> lastRows;
+        string lastXcol = "";
+        List<string> lastYcols = new List<string>();
+        string lastTable = "";
+        bool loadingDbs = false;
+        bool pinned = false;
+        int paletteCounter = 0;
+        bool draggingLegend = false;
+        Point dragStart = Point.Empty;
+        PointF crossPos = new PointF(-1, -1);
+        Form floatTip;
+        bool showCross = true;
+        bool legendHiddenByUser = false;
+        Panel legendBar;
+        FlowLayoutPanel legendFlow;
+
+        static readonly Color ThemeBlue = Color.FromArgb(41, 101, 173);
+        static readonly Color PanelBg = Color.FromArgb(246, 248, 251);
+        static readonly Color BorderLine = Color.FromArgb(214, 221, 230);
+
+        public MainForm()
+        {
+            configPath = Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "config.ini");
+            config = ConfigData.Load(configPath);
+            InitUI();
+            FillConnFields();
+            Shown += delegate { FitWindowToScreen(); };
+        }
+
+        void FitWindowToScreen()
+        {
+            try
+            {
+                Screen scr = Screen.FromControl(this);
+                int w = (int)(scr.WorkingArea.Width * 0.92);
+                int h = (int)(scr.WorkingArea.Height * 0.92);
+                if (w < 1000) w = 1000;
+                if (h < 700) h = 700;
+                this.Width = w;
+                this.Height = h;
+                this.StartPosition = FormStartPosition.CenterScreen;
+            }
+            catch { }
+        }
+
+        void InitUI()
+        {
+            Text = "趋势分析预测工具";
+            Size = new Size(1240, 820);
+            MinimumSize = new Size(1000, 700);
+            StartPosition = FormStartPosition.CenterScreen;
+            Font = new Font("Microsoft YaHei UI", 9F);
+            BackColor = PanelBg;
+            try
+            {
+                using (Stream s = Assembly.GetExecutingAssembly().GetManifestResourceStream("hamster.ico"))
+                {
+                    if (s != null)
+                        this.Icon = new Icon(s);
+                }
+            }
+            catch { }
+
+            left = new Panel();
+            left.Width = 380;
+            left.BackColor = PanelBg;
+            left.AutoScroll = true;
+            Controls.Add(left);
+
+            Panel right = new Panel();
+            right.BackColor = Color.White;
+            Controls.Add(right);
+            this.right = right;
+
+            Panel splitter = new Panel();
+            splitter.BackColor = BorderLine;
+            splitter.Cursor = Cursors.SizeWE;
+            Controls.Add(splitter);
+            splitterRef = splitter;
+            SetupSplitterDrag(splitter);
+
+            this.Resize += delegate { LayoutPanels(left, right, splitter); };
+            LayoutPanels(left, right, splitter);
+            left.Resize += delegate { LayoutLeftPanel(); };
+
+            int x2 = 8;
+            int iw = 406;
+            int y = 4;
+
+            btnCollapse = MakeIconButton("折叠", 0);
+            btnCollapse.Location = new Point(x2, y);
+            btnCollapse.Size = new Size(200, 30);
+            btnCollapse.Click += delegate
+            {
+                left.Visible = false;
+                LayoutPanels(left, right, splitterRef);
+                btnExpand.Visible = true;
+                btnExpand.BringToFront();
+            };
+            left.Controls.Add(btnCollapse);
+
+            btnPin = MakeIconButton("钉住", 1);
+            btnPin.Location = new Point(x2 + 208, y);
+            btnPin.Size = new Size(206, 30);
+            btnPin.Click += delegate { TogglePin(); };
+            left.Controls.Add(btnPin);
+            y += 40;
+
+            Label title1 = new Label();
+            title1.Text = "服务器连接";
+            title1.Font = new Font("Microsoft YaHei UI", 10F, FontStyle.Bold);
+            title1.ForeColor = ThemeBlue;
+            title1.Location = new Point(x2, y);
+            title1.AutoSize = true;
+            left.Controls.Add(title1);
+            y += 30;
+
+            AddLabel(left, "主机地址:", x2, y);
+            txtHost = AddText(left, config.Host, x2 + 88, y, 132);
+            AddLabel2(left, "端口:", x2 + 226, y);
+            txtPort = AddText(left, config.Port, x2 + 270, y, 144);
+            y += 36;
+
+            AddLabel(left, "用户名:", x2, y);
+            txtUser = AddText(left, config.User, x2 + 88, y, 132);
+            AddLabel2(left, "密码:", x2 + 226, y);
+            txtPassword = AddText(left, config.Password, x2 + 270, y, 144, true);
+            y += 36;
+
+            AddLabel(left, "DB:", x2, y);
+            cmbDatabase = MakeCombo();
+            cmbDatabase.DropDownStyle = ComboBoxStyle.DropDown;
+            cmbDatabase.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
+            cmbDatabase.AutoCompleteSource = AutoCompleteSource.ListItems;
+            cmbDatabase.Location = new Point(x2 + 88, y);
+            cmbDatabase.Size = new Size(iw - 88, 28);
+            cmbDatabase.SelectedIndexChanged += delegate { DatabaseSelected(); };
+            cmbDatabase.KeyDown += delegate(object s, KeyEventArgs e)
+            {
+                if (e.KeyCode == Keys.Enter)
+                {
+                    e.SuppressKeyPress = true;
+                    DatabaseSelected();
+                }
+            };
+            left.Controls.Add(cmbDatabase);
+            y += 38;
+
+            btnConnect = new Button();
+            btnConnect.Text = "连 接";
+            btnConnect.Location = new Point(x2, y);
+            btnConnect.Size = new Size(iw, 34);
+            btnConnect.FlatStyle = FlatStyle.Flat;
+            btnConnect.FlatAppearance.BorderSize = 0;
+            btnConnect.BackColor = ThemeBlue;
+            btnConnect.ForeColor = Color.White;
+            btnConnect.Font = new Font("Microsoft YaHei UI", 10F, FontStyle.Bold);
+            btnConnect.Cursor = Cursors.Hand;
+            btnConnect.Click += delegate { ConnectAndLoad(); };
+            left.Controls.Add(btnConnect);
+            y += 46;
+
+            Label titleQ = new Label();
+            titleQ.Text = "排序规则";
+            titleQ.Font = new Font("Microsoft YaHei UI", 10F, FontStyle.Bold);
+            titleQ.ForeColor = ThemeBlue;
+            titleQ.Location = new Point(x2, y);
+            titleQ.AutoSize = true;
+            left.Controls.Add(titleQ);
+            y += 30;
+
+            AddLabel(left, "方向:", x2, y);
+            cmbOrder = MakeCombo();
+            cmbOrder.Location = new Point(x2 + 88, y);
+            cmbOrder.Size = new Size(156, 28);
+            cmbOrder.Items.Add("正序 (最早在前)");
+            cmbOrder.Items.Add("倒序 (最新在前)");
+            cmbOrder.SelectedIndex = 0;
+            left.Controls.Add(cmbOrder);
+
+            AddLabel2(left, "条数:", x2 + 246, y);
+            txtLimit = AddText(left, "2000", x2 + 288, y, 126);
+            y += 36;
+
+            AddLabel(left, "偏移:", x2, y);
+            txtOffset = AddText(left, "0", x2 + 88, y, 156);
+            Label tipL = new Label();
+            tipL.Text = "跳过前 N 行";
+            tipL.Font = new Font("Microsoft YaHei UI", 8.5F);
+            tipL.ForeColor = Color.FromArgb(140, 150, 160);
+            tipL.Location = new Point(x2 + 250, y + 6);
+            tipL.AutoSize = true;
+            left.Controls.Add(tipL);
+            y += 42;
+
+            AddLabel(left, "起点:", x2, y);
+            txtTailOffset = AddText(left, "0", x2 + 88, y, 156);
+            y += 22;
+            Label tipT = new Label();
+            tipT.Text = "从最新数据往回数 N 条作为查询起点";
+            tipT.Font = new Font("Microsoft YaHei UI", 8.5F);
+            tipT.ForeColor = Color.FromArgb(140, 150, 160);
+            tipT.Location = new Point(x2 + 88, y);
+            tipT.AutoSize = true;
+            left.Controls.Add(tipT);
+            y += 20;
+
+            Label title2 = new Label();
+            title2.Text = "存储表与坐标轴";
+            title2.Font = new Font("Microsoft YaHei UI", 10F, FontStyle.Bold);
+            title2.ForeColor = ThemeBlue;
+            title2.Location = new Point(x2, y);
+            title2.AutoSize = true;
+            left.Controls.Add(title2);
+            y += 30;
+
+            AddLabel(left, "存储表:", x2, y);
+            cmbTable = MakeCombo();
+            cmbTable.Location = new Point(x2 + 88, y);
+            cmbTable.Size = new Size(iw - 88, 28);
+            cmbTable.SelectedIndexChanged += delegate { TableSelected(); };
+            left.Controls.Add(cmbTable);
+            y += 36;
+
+            AddLabel(left, "横坐标:", x2, y);
+            cmbX = MakeCombo();
+            cmbX.Location = new Point(x2 + 88, y);
+            cmbX.Size = new Size(iw - 88, 28);
+            left.Controls.Add(cmbX);
+            y += 36;
+
+            AddLabel(left, "横轴类型:", x2, y);
+            cmbXType = MakeCombo();
+            cmbXType.Location = new Point(x2 + 88, y);
+            cmbXType.Size = new Size(iw - 88, 28);
+            cmbXType.Items.Add("自动识别");
+            cmbXType.Items.Add("时间");
+            cmbXType.Items.Add("数值");
+            cmbXType.Items.Add("文本");
+            cmbXType.SelectedIndex = 0;
+            left.Controls.Add(cmbXType);
+            y += 36;
+
+            AddLabel(left, "纵坐标:", x2, y);
+            lbY = new ListBox();
+            lbY.BorderStyle = BorderStyle.FixedSingle;
+            lbY.Location = new Point(x2 + 88, y);
+            lbY.Size = new Size(iw - 88, 96);
+            lbY.HorizontalScrollbar = true;
+            lbY.SelectionMode = SelectionMode.MultiExtended;
+            lbY.BackColor = Color.White;
+            lbY.IntegralHeight = false;
+            left.Controls.Add(lbY);
+            y += 104;
+
+            Label tipY = new Label();
+            tipY.Text = "提示: 按住 Ctrl 键可多选纵坐标";
+            tipY.Font = new Font("Microsoft YaHei UI", 8.5F);
+            tipY.ForeColor = Color.FromArgb(140, 150, 160);
+            tipY.Location = new Point(x2 + 88, y);
+            tipY.AutoSize = true;
+            left.Controls.Add(tipY);
+            y += 24;
+
+            Label title3 = new Label();
+            title3.Text = "过滤规则 (多行按 AND/OR 连接)";
+            title3.Font = new Font("Microsoft YaHei UI", 10F, FontStyle.Bold);
+            title3.ForeColor = ThemeBlue;
+            title3.Location = new Point(x2, y);
+            title3.AutoSize = true;
+            left.Controls.Add(title3);
+            y += 30;
+
+            dgvFilter = new DataGridView();
+            dgvFilter.Location = new Point(x2, y);
+            dgvFilter.Size = new Size(iw, 140);
+            dgvFilter.AllowUserToAddRows = false;
+            dgvFilter.AllowUserToDeleteRows = false;
+            dgvFilter.AllowUserToResizeRows = false;
+            dgvFilter.RowHeadersVisible = false;
+            dgvFilter.BackgroundColor = Color.White;
+            dgvFilter.BorderStyle = BorderStyle.FixedSingle;
+            dgvFilter.EnableHeadersVisualStyles = false;
+            dgvFilter.ColumnHeadersDefaultCellStyle.BackColor = Color.FromArgb(52, 73, 94);
+            dgvFilter.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
+            dgvFilter.ColumnHeadersDefaultCellStyle.Font = new Font("Microsoft YaHei UI", 8.5F, FontStyle.Bold);
+            dgvFilter.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
+            dgvFilter.ColumnHeadersHeight = 24;
+            dgvFilter.DefaultCellStyle.Font = new Font("Microsoft YaHei UI", 8.5F);
+            dgvFilter.DefaultCellStyle.SelectionBackColor = Color.FromArgb(191, 215, 245);
+            dgvFilter.DefaultCellStyle.SelectionForeColor = Color.Black;
+            dgvFilter.AlternatingRowsDefaultCellStyle.BackColor = Color.FromArgb(244, 247, 251);
+            dgvFilter.GridColor = Color.FromArgb(221, 228, 236);
+            dgvFilter.RowTemplate.Height = 22;
+
+            DataGridViewComboBoxColumn colCol = new DataGridViewComboBoxColumn();
+            colCol.HeaderText = "列";
+            colCol.Width = 132;
+            colCol.FlatStyle = FlatStyle.Flat;
+            dgvFilter.Columns.Add(colCol);
+
+            DataGridViewComboBoxColumn colOp = new DataGridViewComboBoxColumn();
+            colOp.HeaderText = "操作符";
+            colOp.Width = 92;
+            colOp.FlatStyle = FlatStyle.Flat;
+            colOp.Items.Add("=");
+            colOp.Items.Add("!=");
+            colOp.Items.Add(">");
+            colOp.Items.Add(">=");
+            colOp.Items.Add("<");
+            colOp.Items.Add("<=");
+            colOp.Items.Add("LIKE");
+            colOp.Items.Add("BETWEEN");
+            colOp.Items.Add("IS NULL");
+            colOp.Items.Add("IS NOT NULL");
+            dgvFilter.Columns.Add(colOp);
+
+            DataGridViewTextBoxColumn colVal = new DataGridViewTextBoxColumn();
+            colVal.HeaderText = "值";
+            colVal.Width = 120;
+            colVal.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
+            colVal.ToolTipText = "BETWEEN 用逗号分隔两个值";
+            dgvFilter.Columns.Add(colVal);
+
+            DataGridViewComboBoxColumn colLogic = new DataGridViewComboBoxColumn();
+            colLogic.HeaderText = "逻辑";
+            colLogic.Width = 60;
+            colLogic.FlatStyle = FlatStyle.Flat;
+            colLogic.Items.Add("AND");
+            colLogic.Items.Add("OR");
+            dgvFilter.Columns.Add(colLogic);
+
+            left.Controls.Add(dgvFilter);
+            y += 148;
+
+            btnAddRule = MakeSmallButton("+ 添加规则");
+            btnAddRule.Location = new Point(x2, y);
+            btnAddRule.Size = new Size(130, 28);
+            btnAddRule.BackColor = Color.FromArgb(39, 174, 96);
+            btnAddRule.Click += delegate { AddRule(); };
+            left.Controls.Add(btnAddRule);
+
+            btnDelRule = MakeSmallButton("- 删除");
+            btnDelRule.Location = new Point(x2 + 138, y);
+            btnDelRule.Size = new Size(130, 28);
+            btnDelRule.BackColor = Color.FromArgb(192, 57, 43);
+            btnDelRule.Click += delegate { DelRule(); };
+            left.Controls.Add(btnDelRule);
+
+            btnClear = MakeSmallButton("清空");
+            btnClear.Location = new Point(x2 + 276, y);
+            btnClear.Size = new Size(138, 28);
+            btnClear.BackColor = Color.FromArgb(127, 140, 141);
+            btnClear.Click += delegate { dgvFilter.Rows.Clear(); };
+            left.Controls.Add(btnClear);
+            y += 38;
+
+            btnPlot = new Button();
+            btnPlot.Text = "绘制曲线";
+            btnPlot.Location = new Point(x2, y);
+            btnPlot.Size = new Size(204, 42);
+            btnPlot.FlatStyle = FlatStyle.Flat;
+            btnPlot.FlatAppearance.BorderSize = 0;
+            btnPlot.BackColor = Color.FromArgb(39, 174, 96);
+            btnPlot.ForeColor = Color.White;
+            btnPlot.Font = new Font("Microsoft YaHei UI", 11F, FontStyle.Bold);
+            btnPlot.Cursor = Cursors.Hand;
+            btnPlot.Click += delegate { Plot(); };
+            left.Controls.Add(btnPlot);
+
+            btnSave = new Button();
+            btnSave.Text = "保存图片";
+            btnSave.Location = new Point(x2 + 210, y);
+            btnSave.Size = new Size(204, 42);
+            btnSave.FlatStyle = FlatStyle.Flat;
+            btnSave.FlatAppearance.BorderSize = 0;
+            btnSave.BackColor = ThemeBlue;
+            btnSave.ForeColor = Color.White;
+            btnSave.Font = new Font("Microsoft YaHei UI", 11F, FontStyle.Bold);
+            btnSave.Cursor = Cursors.Hand;
+            btnSave.Click += delegate { SaveImage(); };
+            left.Controls.Add(btnSave);
+            y += 52;
+
+            lblStatus = new Label();
+            lblStatus.Text = "请填写服务器连接信息后点击连接";
+            lblStatus.Location = new Point(x2, y);
+            lblStatus.Size = new Size(iw, 18);
+            lblStatus.ForeColor = Color.FromArgb(120, 130, 140);
+            left.Controls.Add(lblStatus);
+
+            lblChartTitle = new Label();
+            lblChartTitle.Dock = DockStyle.Top;
+            lblChartTitle.Height = 36;
+            lblChartTitle.TextAlign = ContentAlignment.MiddleCenter;
+            lblChartTitle.Font = new Font("Microsoft YaHei UI", 12F, FontStyle.Bold);
+            lblChartTitle.ForeColor = ThemeBlue;
+            lblChartTitle.Text = "";
+            right.Controls.Add(lblChartTitle);
+
+            legendBar = new Panel();
+            legendBar.Dock = DockStyle.Top;
+            legendBar.Height = 30;
+            legendBar.BackColor = Color.FromArgb(250, 250, 252);
+            legendBar.Visible = false;
+            right.Controls.Add(legendBar);
+
+            legendFlow = new FlowLayoutPanel();
+            legendFlow.Dock = DockStyle.Fill;
+            legendFlow.BackColor = Color.FromArgb(250, 250, 252);
+            legendFlow.Padding = new Padding(10, 4, 10, 4);
+            legendBar.Controls.Add(legendFlow);
+
+            Panel bar = new Panel();
+            bar.Dock = DockStyle.Top;
+            bar.Height = 44;
+            bar.BackColor = Color.FromArgb(240, 243, 247);
+            right.Controls.Add(bar);
+
+            Label lTarget = new Label();
+            lTarget.Text = "曲线:";
+            lTarget.Location = new Point(12, 14);
+            lTarget.AutoSize = true;
+            lTarget.ForeColor = Color.FromArgb(60, 70, 80);
+            bar.Controls.Add(lTarget);
+
+            cmbCalcTarget = new ComboBox();
+            cmbCalcTarget.DropDownStyle = ComboBoxStyle.DropDownList;
+            cmbCalcTarget.FlatStyle = FlatStyle.Flat;
+            cmbCalcTarget.Location = new Point(52, 8);
+            cmbCalcTarget.Size = new Size(86, 26);
+            bar.Controls.Add(cmbCalcTarget);
+
+            Label lCalc = new Label();
+            lCalc.Text = "运算:";
+            lCalc.Location = new Point(142, 14);
+            lCalc.AutoSize = true;
+            lCalc.ForeColor = Color.FromArgb(60, 70, 80);
+            bar.Controls.Add(lCalc);
+
+            cmbCalc = new ComboBox();
+            cmbCalc.DropDownStyle = ComboBoxStyle.DropDownList;
+            cmbCalc.FlatStyle = FlatStyle.Flat;
+            cmbCalc.Location = new Point(184, 8);
+            cmbCalc.Size = new Size(160, 26);
+            cmbCalc.Items.Add("贝叶斯回归 (AI)");
+            cmbCalc.Items.Add("常用对数 (log10)");
+            cmbCalc.Items.Add("对数 (ln)");
+            cmbCalc.Items.Add("多项式拟合 (Polyfit) (AI)");
+            cmbCalc.Items.Add("二次变换 (a*y²+b) (AI)");
+            cmbCalc.Items.Add("积分 (累积)");
+            cmbCalc.Items.Add("开方 (sqrt)");
+            cmbCalc.Items.Add("平滑曲线 (滑动平均)");
+            cmbCalc.Items.Add("梯度下降 (AI)");
+            cmbCalc.Items.Add("微分 (差分)");
+            cmbCalc.Items.Add("线性回归 (AI)");
+            cmbCalc.Items.Add("线性变换 (a*y+b) (AI)");
+            cmbCalc.Items.Add("指数 (exp)");
+            int defCalc = cmbCalc.Items.IndexOf("平滑曲线 (滑动平均)");
+            cmbCalc.SelectedIndex = defCalc >= 0 ? defCalc : 0;
+            cmbCalc.SelectedIndexChanged += delegate { UpdateCalcParamUI(); };
+            bar.Controls.Add(cmbCalc);
+
+            Label lParam = new Label();
+            lParam.Text = "无参数";
+            lParam.Location = new Point(350, 14);
+            lParam.AutoSize = true;
+            lParam.ForeColor = Color.FromArgb(60, 70, 80);
+            bar.Controls.Add(lParam);
+            this.lblCalcParam = lParam;
+
+            txtCalcParam = new TextBox();
+            txtCalcParam.Text = "5";
+            txtCalcParam.Location = new Point(398, 8);
+            txtCalcParam.Width = 50;
+            txtCalcParam.BorderStyle = BorderStyle.FixedSingle;
+            txtCalcParam.Enabled = false;
+            bar.Controls.Add(txtCalcParam);
+            UpdateCalcParamUI();
+
+            btnApplyCalc = MakeSmallButton("生成运算曲线");
+            btnApplyCalc.Location = new Point(456, 6);
+            btnApplyCalc.Size = new Size(104, 30);
+            btnApplyCalc.BackColor = ThemeBlue;
+            btnApplyCalc.Click += delegate { ApplyCalc(); };
+            bar.Controls.Add(btnApplyCalc);
+
+            btnClearCalc = MakeSmallButton("清除运算");
+            btnClearCalc.Location = new Point(490, 6);
+            btnClearCalc.Size = new Size(92, 30);
+            btnClearCalc.BackColor = Color.FromArgb(127, 140, 141);
+            btnClearCalc.Click += delegate { ClearCalcSeries(); };
+            bar.Controls.Add(btnClearCalc);
+
+            btnLegend = MakeSmallButton("隐藏图例");
+            btnLegend.Location = new Point(588, 6);
+            btnLegend.Size = new Size(92, 30);
+            btnLegend.BackColor = Color.FromArgb(52, 73, 94);
+            btnLegend.Click += delegate { ToggleLegend(); };
+            bar.Controls.Add(btnLegend);
+
+            btnSettings = MakeSmallButton("图表设置");
+            btnSettings.Location = new Point(686, 6);
+            btnSettings.Size = new Size(92, 30);
+            btnSettings.BackColor = Color.FromArgb(52, 73, 94);
+            btnSettings.Click += delegate { OpenChartSettings(); };
+            bar.Controls.Add(btnSettings);
+
+            btnCross = MakeSmallButton("隐藏十字线");
+            btnCross.Location = new Point(786, 6);
+            btnCross.Size = new Size(104, 30);
+            btnCross.BackColor = Color.FromArgb(52, 73, 94);
+            btnCross.Click += delegate { ToggleCross(); };
+            bar.Controls.Add(btnCross);
+
+            chart = new Chart();
+            chart.Dock = DockStyle.Fill;
+            chart.BackColor = Color.White;
+            chart.BorderlineColor = BorderLine;
+            chart.BorderlineWidth = 1;
+            ChartArea area = new ChartArea("main");
+            area.BackColor = Color.White;
+            area.AxisX.MajorGrid.LineColor = Color.FromArgb(235, 238, 242);
+            area.AxisY.MajorGrid.LineColor = Color.FromArgb(235, 238, 242);
+            area.AxisX.LineColor = BorderLine;
+            area.AxisY.LineColor = BorderLine;
+            area.AxisX.LabelStyle.Font = new Font("Microsoft YaHei UI", 9F);
+            area.AxisY.LabelStyle.Font = new Font("Microsoft YaHei UI", 9F);
+            area.AxisX.TitleFont = new Font("Microsoft YaHei UI", 9F, FontStyle.Bold);
+            area.AxisY.TitleFont = new Font("Microsoft YaHei UI", 9F, FontStyle.Bold);
+            area.AxisX.TitleForeColor = ThemeBlue;
+            area.AxisY.TitleForeColor = ThemeBlue;
+            chart.ChartAreas.Add(area);
+            chart.Legends.Add(new Legend("legend"));
+            chart.Legends["legend"].Enabled = false;
+            chart.Legends["legend"].Font = new Font("Microsoft YaHei UI", 9F);
+            chart.Legends["legend"].BackColor = Color.FromArgb(250, 250, 252);
+            chart.Legends["legend"].BorderColor = BorderLine;
+            chart.Legends["legend"].BorderWidth = 1;
+            chart.Legends["legend"].Alignment = StringAlignment.Near;
+            right.Controls.Add(chart);
+
+            SetupLegendDrag();
+            chart.MouseMove += Chart_MouseMove;
+            chart.MouseClick += Chart_MouseClick;
+            chart.MouseLeave += delegate { crossPos = new PointF(-1, -1); chart.Invalidate(); };
+            chart.PostPaint += Chart_PostPaint;
+
+            btnExpand = MakeIconButton("展开配置", 2);
+            btnExpand.Location = new Point(4, 50);
+            btnExpand.Size = new Size(110, 32);
+            btnExpand.FlatStyle = FlatStyle.Flat;
+            btnExpand.FlatAppearance.BorderSize = 0;
+            btnExpand.BackColor = ThemeBlue;
+            btnExpand.ForeColor = Color.White;
+            btnExpand.Font = new Font("Microsoft YaHei UI", 9F, FontStyle.Bold);
+            btnExpand.Cursor = Cursors.Hand;
+            btnExpand.Visible = false;
+            btnExpand.Click += delegate
+            {
+                left.Visible = true;
+                LayoutPanels(left, right, splitterRef);
+                btnExpand.Visible = false;
+            };            right.Controls.Add(btnExpand);
+            btnExpand.BringToFront();
+            LayoutLeftPanel();
+        }
+
+        void SetupLegendDrag()
+        {
+            chart.MouseDown += delegate(object s, MouseEventArgs e)
+            {
+                if (e.Button != MouseButtons.Left) return;
+                try
+                {
+                    Legend lg = chart.Legends["legend"];
+                    if (!lg.Enabled) return;
+                    HitTestResult hr = chart.HitTest(e.X, e.Y);
+                    if (hr != null && hr.ChartElementType == ChartElementType.LegendArea)
+                    {
+                        draggingLegend = true;
+                        dragStart = e.Location;
+                        chart.Cursor = Cursors.Hand;
+                    }
+                }
+                catch { }
+            };
+            chart.MouseMove += delegate(object s, MouseEventArgs e)
+            {
+                if (!draggingLegend) return;
+                try
+                {
+                    if (chart.Width <= 0 || chart.Height <= 0) return;
+                    Legend lg = chart.Legends["legend"];
+                    ElementPosition p = lg.Position;
+                    p.Auto = false;
+                    float dx = e.X - dragStart.X;
+                    float dy = e.Y - dragStart.Y;
+                    p.X += dx / chart.Width * 100f;
+                    p.Y += dy / chart.Height * 100f;
+                    if (p.X < -p.Width) p.X = -p.Width + 2;
+                    if (p.X > 100) p.X = 98;
+                    if (p.Y < 0) p.Y = 0;
+                    if (p.Y > 100) p.Y = 98;
+                    dragStart = e.Location;
+                    chart.Invalidate();
+                }
+                catch { draggingLegend = false; }
+            };
+            chart.MouseUp += delegate(object s, MouseEventArgs e)
+            {
+                draggingLegend = false;
+                chart.Cursor = Cursors.Default;
+            };
+        }
+
+        void Chart_MouseMove(object sender, MouseEventArgs e)
+        {
+            if (draggingLegend) return;
+            try
+            {
+                ChartArea area = chart.ChartAreas["main"];
+                bool inside = IsInPlotArea(e.Location, area);
+                PointF np = inside ? new PointF(e.X, e.Y) : new PointF(-1, -1);
+                if (np.X != crossPos.X || np.Y != crossPos.Y)
+                {
+                    crossPos = np;
+                    chart.Invalidate();
+                }
+            }
+            catch { }
+        }
+
+        void Chart_MouseClick(object sender, MouseEventArgs e)
+        {
+            if (e.Button != MouseButtons.Left) return;
+            try
+            {
+                HitTestResult hr = chart.HitTest(e.X, e.Y);
+                if (hr != null && hr.ChartElementType == ChartElementType.DataPoint &&
+                    hr.Series != null && hr.PointIndex >= 0 &&
+                    hr.PointIndex < hr.Series.Points.Count)
+                {
+                    ShowFloatTip(e.Location, hr.Series.Name, hr.Series.Points[hr.PointIndex], hr.PointIndex);
+                }
+                else
+                {
+                    CloseFloatTip();
+                }
+            }
+            catch { }
+        }
+
+        void Chart_PostPaint(object sender, ChartPaintEventArgs e)
+        {
+            if (e.ChartElement != chart || !showCross || crossPos.X < 0) return;
+            try
+            {
+                ChartArea area = chart.ChartAreas["main"];
+                RectangleF pa = GetPlotAreaRect(area);
+                if (pa.Width <= 0 || pa.Height <= 0) return;
+                if (!pa.Contains(crossPos)) return;
+                using (Pen pen = new Pen(Color.FromArgb(150, 90, 90, 90)))
+                {
+                    pen.DashStyle = DashStyle.Dash;
+                    Graphics g = e.ChartGraphics.Graphics;
+                    g.DrawLine(pen, pa.Left, crossPos.Y, pa.Right, crossPos.Y);
+                    g.DrawLine(pen, crossPos.X, pa.Top, crossPos.X, pa.Bottom);
+                }
+            }
+            catch { }
+        }
+
+        RectangleF GetPlotAreaRect(ChartArea area)
+        {
+            ElementPosition areaPos = area.Position;
+            ElementPosition inner = area.InnerPlotPosition;
+            if (areaPos == null || inner == null || inner.Width <= 0 || inner.Height <= 0)
+                return RectangleF.Empty;
+            float ax = chart.Width * areaPos.X / 100f;
+            float ay = chart.Height * areaPos.Y / 100f;
+            float aw = chart.Width * areaPos.Width / 100f;
+            float ah = chart.Height * areaPos.Height / 100f;
+            return new RectangleF(
+                ax + aw * inner.X / 100f,
+                ay + ah * inner.Y / 100f,
+                aw * inner.Width / 100f,
+                ah * inner.Height / 100f);
+        }
+
+        bool IsInPlotArea(Point p, ChartArea area)
+        {
+            RectangleF pa = GetPlotAreaRect(area);
+            return pa.Width > 0 && pa.Height > 0 && pa.Contains(p);
+        }
+
+        void ShowFloatTip(Point chartPoint, string seriesName, DataPoint dp, int pointIndex)
+        {
+            CloseFloatTip();
+            string xStr;
+            if (!string.IsNullOrEmpty(dp.AxisLabel))
+                xStr = dp.AxisLabel;
+            else if (dp.XValue > 1000 && dp.XValue < 400000)
+            {
+                try { xStr = DateTime.FromOADate(dp.XValue).ToString("yyyy-MM-dd HH:mm:ss"); }
+                catch { xStr = dp.XValue.ToString("0.####"); }
+            }
+            else
+                xStr = dp.XValue.ToString("0.####");
+            string yStr = dp.YValues.Length > 0 ? dp.YValues[0].ToString("0.####") : "N/A";
+            string idxStr = pointIndex.ToString();
+
+            Form f = new Form();
+            f.FormBorderStyle = FormBorderStyle.None;
+            f.ShowInTaskbar = false;
+            f.TopMost = true;
+            f.StartPosition = FormStartPosition.Manual;
+            f.BackColor = Color.FromArgb(48, 56, 66);
+            f.AutoSize = true;
+            f.Padding = new Padding(10, 8, 10, 8);
+            f.Font = new Font("Microsoft YaHei UI", 9F);
+
+            TableLayoutPanel tbl = new TableLayoutPanel();
+            tbl.AutoSize = true;
+            tbl.AutoSizeMode = AutoSizeMode.GrowAndShrink;
+            tbl.ColumnCount = 2;
+            tbl.RowCount = 4;
+            tbl.Dock = DockStyle.Fill;
+            f.Controls.Add(tbl);
+
+            AddTipCell(tbl, 0, 0, "曲线:", true, Color.White);
+            AddTipCell(tbl, 1, 0, seriesName, false, Color.FromArgb(110, 190, 255));
+            AddTipCell(tbl, 0, 1, "X:", true, Color.White);
+            AddTipCell(tbl, 1, 1, xStr, false, Color.White);
+            AddTipCell(tbl, 0, 2, "Y:", true, Color.White);
+            AddTipCell(tbl, 1, 2, yStr, false, Color.FromArgb(255, 220, 120));
+            AddTipCell(tbl, 0, 3, "序号:", true, Color.White);
+            AddTipCell(tbl, 1, 3, idxStr, false, Color.White);
+
+            Point sp = chart.PointToScreen(chartPoint);
+            f.Location = new Point(sp.X + 16, sp.Y + 16);
+            f.Deactivate += delegate { CloseFloatTip(); };
+            f.Show();
+            floatTip = f;
+            Screen sc = Screen.FromPoint(sp);
+            if (f.Location.X + f.Width > sc.WorkingArea.Right)
+                f.Location = new Point(sp.X - f.Width - 16, f.Location.Y);
+            if (f.Location.Y + f.Height > sc.WorkingArea.Bottom)
+                f.Location = new Point(f.Location.X, sp.Y - f.Height - 16);
+        }
+
+        void AddTipCell(TableLayoutPanel tbl, int col, int row, string text, bool bold, Color color)
+        {
+            Label l = new Label();
+            l.Text = text;
+            l.AutoSize = true;
+            l.Margin = new Padding(2);
+            l.ForeColor = color;
+            l.Font = new Font("Microsoft YaHei UI", 9F, bold ? FontStyle.Bold : FontStyle.Regular);
+            l.BackColor = Color.Transparent;
+            tbl.Controls.Add(l, col, row);
+        }
+
+        void CloseFloatTip()
+        {
+            if (floatTip != null)
+            {
+                Form f = floatTip;
+                floatTip = null;
+                try { f.Close(); }
+                catch { }
+            }
+        }
+
+        Button MakeToolButton(string text)
+        {
+            Button b = new Button();
+            b.Text = text;
+            b.FlatStyle = FlatStyle.Flat;
+            b.FlatAppearance.BorderColor = BorderLine;
+            b.FlatAppearance.BorderSize = 1;
+            b.BackColor = Color.White;
+            b.ForeColor = Color.FromArgb(60, 70, 80);
+            b.Font = new Font("Microsoft YaHei UI", 9F);
+            b.Cursor = Cursors.Hand;
+            return b;
+        }
+
+        Button MakeIconButton(string text, int iconType)
+        {
+            Button b = new Button();
+            b.Text = "";
+            b.Tag = text;
+            b.FlatStyle = FlatStyle.Flat;
+            b.FlatAppearance.BorderColor = BorderLine;
+            b.FlatAppearance.BorderSize = 1;
+            b.BackColor = Color.White;
+            b.ForeColor = Color.FromArgb(60, 70, 80);
+            b.Font = new Font("Microsoft YaHei UI", 9F);
+            b.Cursor = Cursors.Hand;
+            b.Paint += delegate(object s, PaintEventArgs e)
+            {
+                Button bb = (Button)s;
+                Graphics g = e.Graphics;
+                g.SmoothingMode = SmoothingMode.AntiAlias;
+                g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
+                string t = bb.Tag as string;
+                if (string.IsNullOrEmpty(t)) return;
+                SizeF ts = g.MeasureString(t, bb.Font);
+                int totalW = 16 + 6 + (int)Math.Ceiling(ts.Width);
+                int x0 = (bb.ClientSize.Width - totalW) / 2;
+                if (x0 < 2) x0 = 2;
+                int y0 = (bb.ClientSize.Height - 16) / 2;
+                using (Pen p = new Pen(bb.ForeColor, 2))
+                {
+                    p.StartCap = LineCap.Round;
+                    p.EndCap = LineCap.Round;
+                    if (iconType == 0)
+                    {
+                        g.DrawLine(p, x0 + 13, y0 + 8, x0 + 3, y0 + 8);
+                        g.DrawLine(p, x0 + 3, y0 + 8, x0 + 8, y0 + 3);
+                        g.DrawLine(p, x0 + 3, y0 + 8, x0 + 8, y0 + 13);
+                    }
+                    else if (iconType == 1)
+                    {
+                        g.DrawEllipse(p, x0 + 5, y0 + 1, 6, 6);
+                        g.DrawLine(p, x0 + 8, y0 + 7, x0 + 8, y0 + 13);
+                        g.DrawLine(p, x0 + 4, y0 + 13, x0 + 12, y0 + 13);
+                    }
+                    else
+                    {
+                        g.DrawLine(p, x0 + 3, y0 + 8, x0 + 13, y0 + 8);
+                        g.DrawLine(p, x0 + 13, y0 + 8, x0 + 8, y0 + 3);
+                        g.DrawLine(p, x0 + 13, y0 + 8, x0 + 8, y0 + 13);
+                    }
+                }
+                using (SolidBrush br = new SolidBrush(bb.ForeColor))
+                {
+                    g.DrawString(t, bb.Font, br, x0 + 22, (bb.ClientSize.Height - ts.Height) / 2f);
+                }
+            };
+            return b;
+        }
+
+        ComboBox MakeCombo()
+        {
+            ComboBox c = new ComboBox();
+            c.DropDownStyle = ComboBoxStyle.DropDownList;
+            c.FlatStyle = FlatStyle.Flat;
+            c.BackColor = Color.White;
+            return c;
+        }
+
+        Button MakeSmallButton(string text)
+        {
+            Button b = new Button();
+            b.Text = text;
+            b.FlatStyle = FlatStyle.Flat;
+            b.FlatAppearance.BorderSize = 0;
+            b.ForeColor = Color.White;
+            b.Font = new Font("Microsoft YaHei UI", 9F, FontStyle.Bold);
+            b.Cursor = Cursors.Hand;
+            return b;
+        }
+
+        void AddLabel(Control parent, string text, int x, int y)
+        {
+            Label l = new Label();
+            l.Text = text;
+            l.Location = new Point(x, y + 4);
+            l.AutoSize = false;
+            l.Width = 84;
+            l.Height = 24;
+            l.TextAlign = ContentAlignment.MiddleRight;
+            l.ForeColor = Color.FromArgb(60, 70, 80);
+            parent.Controls.Add(l);
+        }
+
+        void AddLabel2(Control parent, string text, int x, int y)
+        {
+            Label l = new Label();
+            l.Text = text;
+            l.Location = new Point(x, y + 4);
+            l.AutoSize = false;
+            l.Width = 38;
+            l.Height = 24;
+            l.TextAlign = ContentAlignment.MiddleRight;
+            l.ForeColor = Color.FromArgb(60, 70, 80);
+            parent.Controls.Add(l);
+        }
+
+        void AddLabel3(Control parent, string text, int x, int y)
+        {
+            Label l = new Label();
+            l.Text = text;
+            l.Location = new Point(x, y + 4);
+            l.AutoSize = false;
+            l.Width = 90;
+            l.Height = 24;
+            l.TextAlign = ContentAlignment.MiddleRight;
+            l.ForeColor = Color.FromArgb(60, 70, 80);
+            parent.Controls.Add(l);
+        }
+
+        TextBox AddText(Control parent, string text, int x, int y, int width)
+        {
+            return AddText(parent, text, x, y, width, false);
+        }
+
+        TextBox AddText(Control parent, string text, int x, int y, int width, bool password)
+        {
+            TextBox t = new TextBox();
+            t.Text = text;
+            t.Location = new Point(x, y);
+            t.Width = width;
+            t.BorderStyle = BorderStyle.FixedSingle;
+            t.UseSystemPasswordChar = password;
+            parent.Controls.Add(t);
+            return t;
+        }
+
+        void LayoutPanels(Panel leftP, Panel rightP, Panel splitterP)
+        {
+            int w = ClientSize.Width;
+            int h = ClientSize.Height;
+            if (w < 100 || h < 100) return;
+            int lw = leftP.Visible ? leftP.Width : 0;
+            if (lw > 0)
+            {
+                leftP.Location = new Point(0, 0);
+                leftP.Size = new Size(lw, h);
+                leftP.Padding = new Padding(12, 8, 12, 8);
+                splitterP.Location = new Point(lw, 0);
+                splitterP.Size = new Size(5, h);
+                splitterP.Visible = true;
+                rightP.Location = new Point(lw + 5, 0);
+            }
+            else
+            {
+                splitterP.Visible = false;
+                rightP.Location = new Point(0, 0);
+            }
+            rightP.Size = new Size(w - rightP.Location.X, h);
+        }
+
+        const int MinLeftLayoutW = 380;
+
+        void LayoutLeftPanel()
+        {
+            try
+            {
+                int layW = Math.Max(left.ClientSize.Width, MinLeftLayoutW);
+                int x2 = 8;
+                int availW = layW - 12 - x2;
+                int inputX = x2 + 88;
+                int inputW = availW - 88;
+                int gap = 12;
+
+                int leftColW = (int)(availW * 0.54);
+                int w1 = leftColW - 88 - gap;
+                if (w1 < 100) w1 = 100;
+                int rightLabelX = x2 + leftColW;
+                int rightInputX = rightLabelX + 38 + gap;
+                int w2 = availW - leftColW - 38 - gap;
+                if (w2 < 90) w2 = 90;
+
+                int bw2 = (availW - 8) / 2;
+
+                btnCollapse.Location = new Point(x2, 4);
+                btnCollapse.Size = new Size(bw2, 30);
+                btnPin.Location = new Point(x2 + bw2 + 8, 4);
+                btnPin.Size = new Size(availW - bw2 - 8, 30);
+
+                txtHost.Location = new Point(inputX, 74);
+                txtHost.Width = w1;
+                txtPort.Location = new Point(rightInputX, 74);
+                txtPort.Width = w2;
+                txtUser.Location = new Point(inputX, 110);
+                txtUser.Width = w1;
+                txtPassword.Location = new Point(rightInputX, 110);
+                txtPassword.Width = w2;
+
+                cmbDatabase.Location = new Point(inputX, 146);
+                cmbDatabase.Width = inputW;
+                btnConnect.Location = new Point(x2, 184);
+                btnConnect.Width = availW;
+
+                cmbOrder.Location = new Point(inputX, 260);
+                cmbOrder.Width = w1;
+                txtLimit.Location = new Point(rightInputX, 260);
+                txtLimit.Width = w2;
+
+                txtOffset.Location = new Point(inputX, 296);
+                txtOffset.Width = inputW;
+                txtTailOffset.Location = new Point(inputX, 338);
+                txtTailOffset.Width = inputW;
+
+                cmbTable.Location = new Point(inputX, 410);
+                cmbTable.Width = inputW;
+                cmbX.Location = new Point(inputX, 446);
+                cmbX.Width = inputW;
+                cmbXType.Location = new Point(inputX, 482);
+                cmbXType.Width = inputW;
+                lbY.Location = new Point(inputX, 518);
+                lbY.Width = inputW;
+
+                dgvFilter.Location = new Point(x2, 676);
+                dgvFilter.Width = availW;
+
+                int bw3 = (availW - 16) / 3;
+                btnAddRule.Location = new Point(x2, 824);
+                btnAddRule.Width = bw3;
+                btnDelRule.Location = new Point(x2 + bw3 + 8, 824);
+                btnDelRule.Width = bw3;
+                btnClear.Location = new Point(x2 + bw3 * 2 + 16, 824);
+                btnClear.Width = availW - bw3 * 2 - 16;
+
+                btnPlot.Location = new Point(x2, 862);
+                btnPlot.Width = bw2;
+                btnSave.Location = new Point(x2 + bw2 + 8, 862);
+                btnSave.Width = availW - bw2 - 8;
+
+                lblStatus.Location = new Point(x2, 914);
+                lblStatus.Width = availW;
+
+                SetLabelX("端口:", rightLabelX);
+                SetLabelX("密码:", rightLabelX);
+                SetLabelX("条数:", rightLabelX);
+                SetLabelX("跳过前 N 行", inputX + inputW + 8);
+                SetLabelX("从最新数据往回数 N 条作为查询起点", inputX);
+            }
+            catch { }
+        }
+
+        Label FindLabel(string text)
+        {
+            foreach (Control c in left.Controls)
+            {
+                if (c is Label && c.Text == text) return (Label)c;
+            }
+            return null;
+        }
+
+        void SetLabelX(string text, int x)
+        {
+            Label l = FindLabel(text);
+            if (l != null) l.Location = new Point(x, l.Location.Y);
+        }
+
+        void TogglePin()
+        {
+            pinned = !pinned;
+            if (pinned)
+            {
+                btnPin.BackColor = ThemeBlue;
+                btnPin.ForeColor = Color.White;
+                btnPin.Tag = "已钉住";
+            }
+            else
+            {
+                btnPin.BackColor = Color.White;
+                btnPin.ForeColor = Color.FromArgb(60, 70, 80);
+                btnPin.Tag = "钉住";
+            }
+        }
+
+        void SetupSplitterDrag(Panel splitterP)
+        {
+            bool dragging = false;
+            int startX = 0;
+            int startWidth = 0;
+            splitterP.MouseDown += delegate(object s, MouseEventArgs e)
+            {
+                if (pinned) return;
+                dragging = true;
+                startX = e.X;
+                startWidth = left.Width;
+                splitterP.Capture = true;
+            };
+            splitterP.MouseMove += delegate(object s, MouseEventArgs e)
+            {
+                if (!dragging) return;
+                int newWidth = startWidth + (e.X - startX);
+                if (newWidth < 380) newWidth = 380;
+                if (newWidth > 800) newWidth = 800;
+                left.Width = newWidth;
+                LayoutPanels(left, (Panel)right, splitterP);
+            };
+            splitterP.MouseUp += delegate(object s, MouseEventArgs e)
+            {
+                dragging = false;
+                splitterP.Capture = false;
+            };
+        }
+
+        void FillConnFields()
+        {
+            txtHost.Text = config.Host;
+            txtPort.Text = config.Port;
+            txtUser.Text = config.User;
+            txtPassword.Text = config.Password;
+            cmbDatabase.Items.Clear();
+            if (!string.IsNullOrEmpty(config.Database))
+            {
+                cmbDatabase.Items.Add(config.Database);
+                cmbDatabase.SelectedIndex = 0;
+            }
+        }
+
+        void SaveConfigFromFields()
+        {
+            config.Host = txtHost.Text.Trim();
+            config.Port = txtPort.Text.Trim();
+            config.User = txtUser.Text.Trim();
+            config.Password = txtPassword.Text;
+            string db = cmbDatabase.SelectedItem as string;
+            if (string.IsNullOrEmpty(db)) db = cmbDatabase.Text.Trim();
+            config.Database = db == null ? "" : db;
+            try { config.Save(configPath); }
+            catch { }
+        }
+
+        void SetStatus(string text, bool error)
+        {
+            lblStatus.Text = text;
+            lblStatus.ForeColor = error ? Color.FromArgb(192, 57, 43) : Color.FromArgb(39, 120, 60);
+        }
+
+        MySqlConnection OpenConn()
+        {
+            SaveConfigFromFields();
+            return OpenConn(config.Database);
+        }
+
+        MySqlConnection OpenConn(string db)
+        {
+            try
+            {
+                MySqlConnectionStringBuilder b = new MySqlConnectionStringBuilder();
+                b.Server = config.Host;
+                b.Port = uint.Parse(config.Port);
+                b.UserID = config.User;
+                b.Password = config.Password;
+                if (!string.IsNullOrEmpty(db)) b.Database = db;
+                b.CharacterSet = config.Charset;
+                b.ConnectionTimeout = 10;
+                MySqlConnection conn = new MySqlConnection(b.ConnectionString);
+                conn.Open();
+                return conn;
+            }
+            catch (Exception ex)
+            {
+                SetStatus("连接失败: " + ex.Message, true);
+                MessageBox.Show(this, "无法连接数据库:\n" + ex.Message, "连接失败",
+                    MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return null;
+            }
+        }
+
+        void ConnectAndLoad()
+        {
+            SaveConfigFromFields();
+            MySqlConnection conn = OpenConn("");
+            if (conn == null) return;
+            try
+            {
+                List<string> dbs = new List<string>();
+                using (MySqlCommand cmd = new MySqlCommand("SHOW DATABASES", conn))
+                using (IDataReader r = cmd.ExecuteReader())
+                {
+                    while (r.Read()) dbs.Add(r.GetString(0));
+                }
+                string prevDb = config.Database;
+                loadingDbs = true;
+                cmbDatabase.Items.Clear();
+                foreach (string d in dbs) cmbDatabase.Items.Add(d);
+                int sel = dbs.IndexOf(prevDb);
+                if (sel >= 0) cmbDatabase.SelectedIndex = sel;
+                else if (dbs.Count > 0) cmbDatabase.SelectedIndex = 0;
+                loadingDbs = false;
+                config.Database = cmbDatabase.SelectedItem as string;
+                if (string.IsNullOrEmpty(config.Database))
+                {
+                    SetStatus("连接成功，但没有可用数据库", true);
+                    return;
+                }
+                try { config.Save(configPath); } catch { }
+            }
+            catch (Exception ex)
+            {
+                SetStatus("读取数据库列表失败: " + ex.Message, true);
+                return;
+            }
+            finally
+            {
+                conn.Close();
+            }
+            MySqlConnection conn2 = OpenConn(config.Database);
+            if (conn2 == null) return;
+            try { LoadTables(conn2); }
+            finally { conn2.Close(); }
+        }
+
+        void DatabaseSelected()
+        {
+            if (loadingDbs) return;
+            string db = cmbDatabase.SelectedItem as string;
+            if (string.IsNullOrEmpty(db)) db = cmbDatabase.Text.Trim();
+            if (string.IsNullOrEmpty(db)) return;
+            SaveConfigFromFields();
+            config.Database = db;
+            try { config.Save(configPath); } catch { }
+            MySqlConnection conn = OpenConn(db);
+            if (conn == null) return;
+            try { LoadTables(conn); }
+            finally { conn.Close(); }
+        }
+
+        void LoadTables(MySqlConnection conn)
+        {
+            try
+            {
+                List<string> tables = new List<string>();
+                using (MySqlCommand cmd = new MySqlCommand("SHOW TABLES", conn))
+                using (IDataReader r = cmd.ExecuteReader())
+                {
+                    while (r.Read()) tables.Add(r.GetString(0));
+                }
+                cmbTable.Items.Clear();
+                foreach (string t in tables) cmbTable.Items.Add(t);
+                if (tables.Count > 0) cmbTable.SelectedIndex = 0;
+                SetStatus("已连接，共 " + tables.Count + " 张表", false);
+            }
+            catch (Exception ex)
+            {
+                SetStatus("读取表列表失败: " + ex.Message, true);
+            }
+        }
+
+        void TableSelected()
+        {
+            string table = cmbTable.SelectedItem as string;
+            if (string.IsNullOrEmpty(table)) return;
+            MySqlConnection conn = OpenConn();
+            if (conn == null) return;
+            try
+            {
+                List<string> cols = new List<string>();
+                using (MySqlCommand cmd = new MySqlCommand(
+                    "SELECT * FROM `" + EscapeIdent(table) + "` LIMIT 0", conn))
+                using (IDataReader r = cmd.ExecuteReader())
+                {
+                    for (int i = 0; i < r.FieldCount; i++)
+                        cols.Add(r.GetName(i));
+                }
+                allColumns = cols;
+                cmbX.Items.Clear();
+                foreach (string c in cols) cmbX.Items.Add(c);
+                if (cols.Count > 0) cmbX.SelectedIndex = 0;
+                lbY.Items.Clear();
+                foreach (string c in cols) lbY.Items.Add(c);
+                DataGridViewComboBoxColumn colCol = (DataGridViewComboBoxColumn)dgvFilter.Columns[0];
+                colCol.Items.Clear();
+                foreach (string c in cols) colCol.Items.Add(c);
+                dgvFilter.Rows.Clear();
+            }
+            catch (Exception ex)
+            {
+                SetStatus("读取列失败: " + ex.Message, true);
+            }
+            finally
+            {
+                conn.Close();
+            }
+        }
+
+        static string EscapeIdent(string name)
+        {
+            return name.Replace("`", "``");
+        }
+
+        void AddRule()
+        {
+            if (allColumns.Count == 0)
+            {
+                MessageBox.Show(this, "请先连接并选择存储表", "提示");
+                return;
+            }
+            int idx = dgvFilter.Rows.Add();
+            dgvFilter.Rows[idx].Cells[0].Value = allColumns[0];
+            dgvFilter.Rows[idx].Cells[1].Value = "=";
+            dgvFilter.Rows[idx].Cells[3].Value = "AND";
+        }
+
+        void DelRule()
+        {
+            if (dgvFilter.SelectedRows.Count > 0)
+                dgvFilter.Rows.Remove(dgvFilter.SelectedRows[0]);
+            else if (dgvFilter.Rows.Count > 0)
+                dgvFilter.Rows.RemoveAt(dgvFilter.Rows.Count - 1);
+        }
+
+        string BuildFilterCondition(DataGridViewRow row)
+        {
+            string col = (row.Cells[0].Value == null ? "" : row.Cells[0].Value.ToString().Trim());
+            string op = (row.Cells[1].Value == null ? "" : row.Cells[1].Value.ToString().Trim());
+            string val = (row.Cells[2].Value == null ? "" : row.Cells[2].Value.ToString().Trim());
+            if (col.Length == 0 || op.Length == 0) return null;
+            string colId = "`" + EscapeIdent(col) + "`";
+            string esc = val.Replace("'", "''");
+            switch (op)
+            {
+                case "IS NULL": return colId + " IS NULL";
+                case "IS NOT NULL": return colId + " IS NOT NULL";
+                case "BETWEEN":
+                    string[] parts = val.Split(',');
+                    if (parts.Length != 2) return null;
+                    return colId + " BETWEEN '" + parts[0].Trim().Replace("'", "''")
+                        + "' AND '" + parts[1].Trim().Replace("'", "''") + "'";
+                case "LIKE":
+                    if (val.Length == 0) return null;
+                    return colId + " LIKE '" + esc + "'";
+                default:
+                    if (val.Length == 0) return null;
+                    return colId + " " + op + " '" + esc + "'";
+            }
+        }
+
+        class FilterItem
+        {
+            public string Cond;
+            public bool IsOr;
+        }
+
+        List<FilterItem> CollectFilterItems()
+        {
+            List<FilterItem> items = new List<FilterItem>();
+            foreach (DataGridViewRow row in dgvFilter.Rows)
+            {
+                if (row.IsNewRow) continue;
+                string cond = BuildFilterCondition(row);
+                if (cond == null) continue;
+                FilterItem it = new FilterItem();
+                it.Cond = cond;
+                object lv = row.Cells[3].Value;
+                it.IsOr = (lv != null && lv.ToString().Trim().Equals("OR", StringComparison.OrdinalIgnoreCase));
+                items.Add(it);
+            }
+            return items;
+        }
+
+        string BuildWhere(List<FilterItem> items)
+        {
+            if (items.Count == 0) return "";
+            StringBuilder sb = new StringBuilder(" WHERE ");
+            for (int i = 0; i < items.Count; i++)
+            {
+                if (i > 0) sb.Append(items[i - 1].IsOr ? " OR " : " AND ");
+                sb.Append(items[i].Cond);
+            }
+            return sb.ToString();
+        }
+
+        string BuildOrderLimit(string xcol)
+        {
+            bool desc = cmbOrder.SelectedIndex == 1;
+            int limit = 0, offset = 0, tail = 0;
+            int.TryParse(txtLimit.Text.Trim(), out limit);
+            int.TryParse(txtOffset.Text.Trim(), out offset);
+            int.TryParse(txtTailOffset.Text.Trim(), out tail);
+            StringBuilder sb = new StringBuilder();
+            if (tail > 0)
+            {
+                sb.Append(" ORDER BY `").Append(EscapeIdent(xcol)).Append("` DESC");
+                if (limit > 0)
+                {
+                    sb.Append(" LIMIT ").Append(limit);
+                    sb.Append(" OFFSET ").Append(tail);
+                }
+                return sb.ToString();
+            }
+            sb.Append(" ORDER BY `").Append(EscapeIdent(xcol)).Append("` ");
+            sb.Append(desc ? "DESC" : "ASC");
+            if (limit > 0)
+            {
+                sb.Append(" LIMIT ").Append(limit);
+                if (offset > 0)
+                    sb.Append(" OFFSET ").Append(offset);
+            }
+            return sb.ToString();
+        }
+
+        void Plot()
+        {
+            string table = cmbTable.SelectedItem as string;
+            string xcol = cmbX.SelectedItem as string;
+            List<string> ycols = new List<string>();
+            foreach (object o in lbY.SelectedItems) ycols.Add(o.ToString());
+            if (string.IsNullOrEmpty(table) || string.IsNullOrEmpty(xcol))
+            {
+                MessageBox.Show(this, "请先选择存储表和横坐标", "提示");
+                return;
+            }
+            if (ycols.Count == 0)
+            {
+                MessageBox.Show(this, "请至少选择一条 Y 轴曲线列", "提示");
+                return;
+            }
+            List<FilterItem> filters = CollectFilterItems();
+            btnPlot.Enabled = false;
+            Thread t = new Thread(delegate () { DoPlot(table, xcol, ycols, filters); });
+            t.IsBackground = true;
+            t.Start();
+        }
+
+        void DoPlot(string table, string xcol, List<string> ycols, List<FilterItem> filters)
+        {
+            MySqlConnection conn = null;
+            try
+            {
+                conn = OpenConn();
+                if (conn == null) return;
+                StringBuilder sb = new StringBuilder();
+                sb.Append("SELECT `").Append(EscapeIdent(xcol)).Append("`");
+                foreach (string y in ycols)
+                    sb.Append(", `").Append(EscapeIdent(y)).Append("`");
+                sb.Append(" FROM `").Append(EscapeIdent(table)).Append("`");
+                sb.Append(BuildWhere(filters));
+                sb.Append(BuildOrderLimit(xcol));
+                List<object[]> rows = new List<object[]>();
+                using (MySqlCommand cmd = new MySqlCommand(sb.ToString(), conn))
+                using (IDataReader r = cmd.ExecuteReader())
+                {
+                    while (r.Read())
+                    {
+                        object[] vals = new object[r.FieldCount];
+                        r.GetValues(vals);
+                        rows.Add(vals);
+                    }
+                }
+                BeginInvoke(new Action(delegate ()
+                {
+                    lastRows = rows;
+                    lastXcol = xcol;
+                    lastYcols = ycols;
+                    lastTable = table;
+                    int tailOfs = 0;
+                    int.TryParse(txtTailOffset.Text.Trim(), out tailOfs);
+                    if (cmbOrder.SelectedIndex == 1 || tailOfs > 0)
+                        rows.Reverse();
+                    RenderPlot(rows, xcol, ycols, table);
+                }));
+            }
+            catch (Exception ex)
+            {
+                BeginInvoke(new Action(delegate ()
+                {
+                    SetStatus("查询失败: " + ex.Message, true);
+                    MessageBox.Show(this, "查询失败:\n" + ex.Message, "错误",
+                        MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }));
+            }
+            finally
+            {
+                if (conn != null) conn.Close();
+                BeginInvoke(new Action(delegate () { btnPlot.Enabled = true; }));
+            }
+        }
+
+        void RenderPlot(List<object[]> rows, string xcol, List<string> ycols, string table)
+        {
+            CloseFloatTip();
+            chart.Series.Clear();
+            calcSeriesNames.Clear();
+            paletteCounter = 0;
+            lblChartTitle.Text = table + " 曲线图";
+            if (rows.Count == 0)
+            {
+                SetStatus("没有符合条件的数据", true);
+                return;
+            }
+            cmbCalcTarget.Items.Clear();
+            foreach (string y in ycols) cmbCalcTarget.Items.Add(y);
+            if (cmbCalcTarget.Items.Count > 0) cmbCalcTarget.SelectedIndex = 0;
+            XAxisInfo xa = AnalyzeXAxis(rows);
+            bool xNumeric = xa.Numeric;
+            bool xIsTime = xa.IsTime;
+            bool xSparseTime = xa.Sparse;
+            bool hasTime = xa.HasTime;
+            DateTime[] xTimes = xa.Times;
+            bool[] xTimeOk = xa.Ok;
+            foreach (string y in ycols)
+            {
+                Series s = new Series(y);
+                s.ChartType = SeriesChartType.Line;
+                s.BorderWidth = 2;
+                s.Color = NextColor();
+                for (int i = 0; i < rows.Count; i++)
+                {
+                    object[] row = rows[i];
+                    object xv = row[0];
+                    object yv = row[1 + ycols.IndexOf(y)];
+                    double yNum;
+                    if (yv == null || yv == DBNull.Value || !TryToDouble(yv, out yNum))
+                        continue;
+                    if (xIsTime)
+                    {
+                        if (xSparseTime)
+                        {
+                            string xStr = xv == null ? "" : xv.ToString();
+                            s.Points.AddXY(xStr, yNum);
+                        }
+                        else
+                        {
+                            if (!xTimeOk[i]) continue;
+                            s.Points.AddXY(xTimes[i], yNum);
+                        }
+                    }
+                    else if (xNumeric)
+                    {
+                        double xNum;
+                        if (xv == null || xv == DBNull.Value || !TryToDouble(xv, out xNum))
+                            continue;
+                        s.Points.AddXY(xNum, yNum);
+                    }
+                    else
+                    {
+                        string xStr = xv == null ? "" : xv.ToString();
+                        s.Points.AddXY(xStr, yNum);
+                    }
+                }
+                chart.Series.Add(s);
+            }
+            ChartArea area = chart.ChartAreas["main"];
+            area.AxisX.Title = xcol;
+            area.AxisY.Title = "数值";
+            area.AxisX.LabelStyle.Angle = xNumeric ? 0 : -45;
+            if (xIsTime)
+            {
+                if (xSparseTime)
+                {
+                    area.AxisX.LabelStyle.Format = "";
+                    area.AxisX.LabelStyle.Angle = -45;
+                    area.AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount;
+                    SetStatus("绘制完成: 表 " + table + ", X 轴 " + xcol + " (批次时间轴)", false);
+                }
+                else
+                {
+                    area.AxisX.LabelStyle.Format = hasTime ? "yyyy-MM-dd HH:mm:ss" : "yyyy-MM-dd";
+                    area.AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount;
+                    SetStatus("绘制完成: 表 " + table + ", X 轴 " + xcol + ", 曲线 " + ycols.Count + " 条", false);
+                }
+            }
+            else
+            {
+                area.AxisX.LabelStyle.Format = "";
+                SetStatus("绘制完成: 表 " + table + ", X 轴 " + xcol + ", 曲线 " + ycols.Count + " 条", false);
+            }
+            RenderLegend();
+        }
+
+        class XAxisInfo
+        {
+            public bool Numeric;
+            public bool IsTime;
+            public bool Sparse;
+            public bool HasTime;
+            public DateTime[] Times;
+            public bool[] Ok;
+        }
+
+        XAxisInfo AnalyzeXAxis(List<object[]> rows)
+        {
+            XAxisInfo info = new XAxisInfo();
+            int n = rows.Count;
+            info.Times = new DateTime[n];
+            info.Ok = new bool[n];
+            int mode = cmbXType.SelectedIndex;
+            if (mode < 0) mode = 0;
+            if (mode == 2)
+            {
+                info.Numeric = true;
+                return info;
+            }
+            if (mode == 3)
+            {
+                info.Numeric = false;
+                return info;
+            }
+            bool forceTime = (mode == 1);
+            bool xNumeric = true;
+            int timeCount = 0, badCount = 0;
+            for (int i = 0; i < n; i++)
+            {
+                object xv = rows[i][0];
+                if (xv == null || xv == DBNull.Value) continue;
+                if (xv is DateTime)
+                {
+                    timeCount++;
+                    info.Times[i] = (DateTime)xv;
+                    info.Ok[i] = true;
+                    if (((DateTime)xv).TimeOfDay != TimeSpan.Zero) info.HasTime = true;
+                }
+                else
+                {
+                    string s = xv as string;
+                    if (s != null)
+                    {
+                        DateTime dt;
+                        if (TryParseTime(s, out dt))
+                        {
+                            timeCount++;
+                            info.Times[i] = dt;
+                            info.Ok[i] = true;
+                            if (dt.TimeOfDay != TimeSpan.Zero) info.HasTime = true;
+                            continue;
+                        }
+                        badCount++;
+                    }
+                    else if (!IsNumeric(xv))
+                    {
+                        badCount++;
+                    }
+                    if (!forceTime && !IsNumeric(xv)) xNumeric = false;
+                }
+            }
+            if (timeCount > 0)
+            {
+                if (!forceTime && badCount > 0 && (double)timeCount / (timeCount + badCount) < 0.8)
+                {
+                    info.Numeric = false;
+                    return info;
+                }
+                info.IsTime = true;
+                info.Numeric = true;
+                info.Sparse = IsTimeSparse(info.Times, info.Ok, n);
+                return info;
+            }
+            info.Numeric = xNumeric;
+            return info;
+        }
+
+        bool IsTimeSparse(DateTime[] times, bool[] ok, int count)
+        {
+            List<double> gaps = new List<double>();
+            bool hasPrev = false;
+            DateTime prev = DateTime.MinValue;
+            for (int i = 0; i < count; i++)
+            {
+                if (!ok[i]) continue;
+                if (hasPrev) gaps.Add((times[i] - prev).TotalSeconds);
+                prev = times[i];
+                hasPrev = true;
+            }
+            if (gaps.Count < 5) return false;
+            double[] sorted = new double[gaps.Count];
+            gaps.CopyTo(sorted);
+            Array.Sort(sorted);
+            double median = sorted[sorted.Length / 2];
+            double maxGap = sorted[sorted.Length - 1];
+            if (median <= 0) return false;
+            return maxGap > median * 30 && maxGap > 3600;
+        }
+
+        void RenderLegend()
+        {            try
+            {
+                legendFlow.Controls.Clear();
+                foreach (Series s in chart.Series)
+                {
+                    Panel item = new Panel();
+                    item.AutoSize = true;
+                    item.BackColor = Color.Transparent;
+                    item.Margin = new Padding(0, 0, 12, 0);
+
+                    Label sw = new Label();
+                    sw.AutoSize = false;
+                    sw.Width = 14;
+                    sw.Height = 14;
+                    sw.BackColor = s.Color;
+                    sw.Location = new Point(0, 3);
+
+                    Label nm = new Label();
+                    nm.Text = s.Name;
+                    nm.AutoSize = true;
+                    nm.Font = new Font("Microsoft YaHei UI", 9F);
+                    nm.ForeColor = Color.FromArgb(60, 70, 80);
+                    nm.Location = new Point(18, 1);
+
+                    item.Controls.Add(sw);
+                    item.Controls.Add(nm);
+                    legendFlow.Controls.Add(item);
+                }
+                int lines = 1;
+                float totalW = 0;
+                float availW = Math.Max(200, right.ClientSize.Width - 30);
+                foreach (Control c in legendFlow.Controls)
+                {
+                    Label nm = (Label)c.Controls[1];
+                    totalW += 18 + nm.PreferredSize.Width + 12;
+                }
+                if (totalW > availW && chart.Series.Count > 0)
+                    lines = Math.Max(1, (int)Math.Ceiling(totalW / availW));
+                legendBar.Height = lines * 26 + 8;
+                legendBar.Visible = chart.Series.Count > 0 && !legendHiddenByUser;
+            }
+            catch { }
+        }
+
+        Color NextColor()
+        {
+            Color[] palette = {
+                Color.RoyalBlue, Color.OrangeRed, Color.ForestGreen, Color.Purple,
+                Color.DarkOrange, Color.Teal, Color.Crimson, Color.DarkGreen,
+                Color.SteelBlue, Color.IndianRed, Color.Olive, Color.MediumVioletRed,
+                Color.SlateBlue, Color.SeaGreen, Color.Chocolate, Color.CadetBlue
+            };
+            Color c = palette[paletteCounter % palette.Length];
+            paletteCounter++;
+            return c;
+        }
+
+        public void RunDrawTest()
+        {
+            try
+            {
+                StringBuilder log = new StringBuilder();
+                MySqlConnection conn = OpenConn();
+                if (conn == null) return;
+                string table = "";
+                using (MySqlCommand cmd = new MySqlCommand("SHOW TABLES", conn))
+                using (IDataReader r = cmd.ExecuteReader())
+                {
+                    List<string> tables = new List<string>();
+                    while (r.Read()) tables.Add(r.GetString(0));
+                    if (tables.Count == 0) throw new Exception("数据库中没有表");
+                    table = tables[0];
+                }
+                List<string> cols = new List<string>();
+                using (MySqlCommand cmd = new MySqlCommand("SELECT * FROM `" + EscapeIdent(table) + "` LIMIT 0", conn))
+                using (IDataReader r = cmd.ExecuteReader())
+                {
+                    for (int i = 0; i < r.FieldCount; i++) cols.Add(r.GetName(i));
+                }
+                string xcol = cols.IndexOf("Time") >= 0 ? "Time" : (cols.Count > 0 ? cols[0] : "");
+                List<string> ycols = new List<string>();
+                if (cols.IndexOf("DataValue") >= 0) ycols.Add("DataValue");
+                if (ycols.Count == 0 && cols.Count > 1) ycols.Add(cols[1]);
+                if (xcol.Length == 0 || ycols.Count == 0) throw new Exception("无法确定横/纵坐标列");
+                StringBuilder sb = new StringBuilder();
+                sb.Append("SELECT `").Append(EscapeIdent(xcol)).Append("`");
+                foreach (string y in ycols)
+                    sb.Append(", `").Append(EscapeIdent(y)).Append("`");
+                sb.Append(" FROM `").Append(EscapeIdent(table)).Append("`");
+                sb.Append(" ORDER BY `").Append(EscapeIdent(xcol)).Append("` ASC");
+                sb.Append(" LIMIT 300");
+                List<object[]> rows = new List<object[]>();
+                using (MySqlCommand cmd = new MySqlCommand(sb.ToString(), conn))
+                using (IDataReader r = cmd.ExecuteReader())
+                {
+                    while (r.Read())
+                    {
+                        object[] vals = new object[r.FieldCount];
+                        r.GetValues(vals);
+                        rows.Add(vals);
+                    }
+                }
+                conn.Close();
+                log.AppendLine("查询行数: " + rows.Count);
+                lastRows = rows;
+                lastXcol = xcol;
+                lastYcols = ycols;
+                lastTable = table;
+                RenderPlot(rows, xcol, ycols, table);
+                Application.DoEvents();
+                Thread.Sleep(500);
+                lblChartTitle.Text = table + " 曲线图 (drawtest)";
+                chart.SaveImage(Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "drawtest.png"), ChartImageFormat.Png);
+                log.AppendLine("图表已保存 drawtest.png, 系列数=" + chart.Series.Count + ", 图例启用=" + chart.Legends["legend"].Enabled);
+                log.AppendLine("DRAWTEST PASS");
+                File.WriteAllText(Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "selftest_result.txt"), log.ToString(), new UTF8Encoding(false));
+            }
+            catch (Exception ex)
+            {
+                try
+                {
+                    string outFile = Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "selftest_result.txt");
+                    File.WriteAllText(outFile, "DRAWTEST FAIL: " + ex.Message + "\n" + ex.StackTrace, new UTF8Encoding(false));
+                }
+                catch { }
+            }
+            Application.Exit();
+        }
+
+        void UpdateCalcParamUI()
+        {
+            string sel = cmbCalc.SelectedItem as string;
+            if (sel == "平滑曲线 (滑动平均)")
+            {
+                lblCalcParam.Text = "窗口:";
+                txtCalcParam.Enabled = true;
+                txtCalcParam.Text = "5";
+            }
+            else if (sel == "多项式拟合 (Polyfit) (AI)")
+            {
+                lblCalcParam.Text = "阶数:";
+                txtCalcParam.Enabled = true;
+                txtCalcParam.Text = "3";
+            }
+            else if (sel == "梯度下降 (AI)")
+            {
+                lblCalcParam.Text = "迭代:";
+                txtCalcParam.Enabled = true;
+                txtCalcParam.Text = "200";
+            }
+            else if (sel == "贝叶斯回归 (AI)")
+            {
+                lblCalcParam.Text = "α:";
+                txtCalcParam.Enabled = true;
+                txtCalcParam.Text = "1";
+            }
+            else if (sel == "线性变换 (a*y+b) (AI)" || sel == "二次变换 (a*y²+b) (AI)")
+            {
+                lblCalcParam.Text = "a,b:";
+                txtCalcParam.Enabled = true;
+                txtCalcParam.Text = "1,0";
+            }
+            else
+            {
+                lblCalcParam.Text = "无参数";
+                txtCalcParam.Enabled = false;
+            }
+            cmbCalcTarget.Enabled = (sel == "线性变换 (a*y+b) (AI)" || sel == "二次变换 (a*y²+b) (AI)");
+        }
+
+        void ToggleCross()
+        {
+            showCross = !showCross;
+            btnCross.Text = showCross ? "隐藏十字线" : "显示十字线";
+            btnCross.BackColor = showCross ? Color.FromArgb(52, 73, 94) : Color.FromArgb(127, 140, 141);
+            if (!showCross) crossPos = new PointF(-1, -1);
+            chart.Invalidate();
+        }
+
+        void ToggleLegend()
+        {
+            legendHiddenByUser = !legendHiddenByUser;
+            legendBar.Visible = chart.Series.Count > 0 && !legendHiddenByUser;
+            btnLegend.Text = legendBar.Visible ? "隐藏图例" : "显示图例";
+            btnLegend.BackColor = legendBar.Visible ? Color.FromArgb(52, 73, 94) : Color.FromArgb(127, 140, 141);
+        }
+
+        void OpenChartSettings()
+        {
+            ChartSettingsForm f = new ChartSettingsForm(chart, lblChartTitle, this);
+            f.ShowDialog(this);
+        }
+
+        void ApplyCalc()
+        {
+            if (lastRows == null || lastRows.Count == 0)
+            {
+                MessageBox.Show(this, "请先绘制曲线", "提示");
+                return;
+            }
+            int param = 5;
+            int.TryParse(txtCalcParam.Text.Trim(), out param);
+            string calcName = cmbCalc.SelectedItem as string;
+            bool singleCurve = (calcName == "线性变换 (a*y+b) (AI)" || calcName == "二次变换 (a*y²+b) (AI)");
+            double a = 1, b = 0;
+            string target = "";
+            if (singleCurve)
+            {
+                target = cmbCalcTarget.SelectedItem as string;
+                if (string.IsNullOrEmpty(target))
+                {
+                    MessageBox.Show(this, "请先在\"曲线\"下拉框选择目标曲线", "提示");
+                    return;
+                }
+                string[] ab = txtCalcParam.Text.Replace("，", ",").Split(',');
+                if (ab.Length >= 2)
+                {
+                    double.TryParse(ab[0].Trim(), System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture, out a);
+                    double.TryParse(ab[1].Trim(), System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture, out b);
+                }
+            }
+            if (calcName == "平滑曲线 (滑动平均)")
+            {
+                if (param < 3) param = 3;
+                if (param > 101) param = 101;
+            }
+            else if (calcName == "多项式拟合 (Polyfit) (AI)")
+            {
+                if (param < 1) param = 1;
+                if (param > 10) param = 10;
+            }
+            else if (calcName == "梯度下降 (AI)")
+            {
+                if (param < 1) param = 1;
+                if (param > 5000) param = 5000;
+            }
+            else if (calcName == "贝叶斯回归 (AI)")
+            {
+                if (param < 1) param = 1;
+                if (param > 1000) param = 1000;
+            }
+            else
+            {
+                param = 1;
+            }
+            XAxisInfo xa = AnalyzeXAxis(lastRows);
+            bool xNumeric = xa.Numeric;
+            bool xSparseTime = xa.Sparse;
+            foreach (string y in lastYcols)
+            {
+                if (singleCurve && y != target) continue;
+                double[] xs = new double[lastRows.Count];
+                double[] ys = new double[lastRows.Count];
+                int[] srcIdx = new int[lastRows.Count];
+                int n = 0;
+                for (int i = 0; i < lastRows.Count; i++)
+                {
+                    object[] row = lastRows[i];
+                    double xv = n;
+                    double yv;
+                    if (!TryToDouble(row[1 + lastYcols.IndexOf(y)], out yv)) continue;
+                    if (xNumeric && !TryToDouble(row[0], out xv))
+                    {
+                        string sx = row[0] as string;
+                        if (sx == null) continue;
+                        DateTime dt;
+                        if (!TryParseTime(sx, out dt)) continue;
+                        xv = dt.ToOADate();
+                    }
+                    xs[n] = xv;
+                    ys[n] = yv;
+                    srcIdx[n] = i;
+                    n++;
+                }
+                double[] nx = new double[n];
+                double[] ny = new double[n];
+                Array.Copy(xs, nx, n);
+                Array.Copy(ys, ny, n);
+                if (n == 0) continue;
+                string seriesName = "";
+                double[] outY = ComputeCalc(calcName, nx, ny, param, a, b, out seriesName);
+                if (outY == null) continue;
+                Series s = new Series(seriesName + "(" + y + ")");
+                s.ChartType = SeriesChartType.Line;
+                s.BorderWidth = 2;
+                s.Color = NextColor();
+                for (int i = 0; i < n; i++)
+                {
+                    if (double.IsNaN(outY[i])) continue;
+                    if (xSparseTime || !xNumeric)
+                        s.Points.AddXY(lastRows[srcIdx[i]][0] == null ? "" : lastRows[srcIdx[i]][0].ToString(), outY[i]);
+                    else s.Points.AddXY(nx[i], outY[i]);
+                }
+                chart.Series.Add(s);
+                calcSeriesNames.Add(s.Name);
+            }
+            if (calcSeriesNames.Count > 0)
+                SetStatus("已生成运算曲线: " + calcName, false);
+        }
+
+        double[] ComputeCalc(string calcName, double[] xs, double[] ys, int param, double a, double b, out string seriesName)
+        {
+            int n = ys.Length;
+            double[] outY = new double[n];
+            for (int i = 0; i < n; i++) outY[i] = double.NaN;
+            if (calcName == "对数 (ln)")
+            {
+                seriesName = "ln";
+                for (int i = 0; i < n; i++)
+                    if (ys[i] > 0) outY[i] = Math.Log(ys[i]);
+            }
+            else if (calcName == "常用对数 (log10)")
+            {
+                seriesName = "log10";
+                for (int i = 0; i < n; i++)
+                    if (ys[i] > 0) outY[i] = Math.Log10(ys[i]);
+            }
+            else if (calcName == "指数 (exp)")
+            {
+                seriesName = "exp";
+                for (int i = 0; i < n; i++)
+                    outY[i] = Math.Exp(ys[i]);
+            }
+            else if (calcName == "开方 (sqrt)")
+            {
+                seriesName = "sqrt";
+                for (int i = 0; i < n; i++)
+                    if (ys[i] >= 0) outY[i] = Math.Sqrt(ys[i]);
+            }
+            else if (calcName == "微分 (差分)")
+            {
+                seriesName = "dy/dx";
+                for (int i = 1; i < n; i++)
+                {
+                    double dx = xs[i] - xs[i - 1];
+                    if (dx != 0) outY[i - 1] = (ys[i] - ys[i - 1]) / dx;
+                }
+            }
+            else if (calcName == "积分 (累积)")
+            {
+                seriesName = "∫ydx";
+                double sum = 0;
+                for (int i = 1; i < n; i++)
+                {
+                    double dx = xs[i] - xs[i - 1];
+                    sum += (ys[i] + ys[i - 1]) / 2.0 * dx;
+                    outY[i] = sum;
+                }
+                outY[0] = 0;
+            }
+            else if (calcName == "线性回归 (AI)")
+            {
+                seriesName = "reg";
+                double sx = 0, sy = 0, sxx = 0, sxy = 0;
+                for (int i = 0; i < n; i++)
+                {
+                    sx += xs[i]; sy += ys[i]; sxx += xs[i] * xs[i]; sxy += xs[i] * ys[i];
+                }
+                double denom = n * sxx - sx * sx;
+                double coefA = 0, coefB = 0;
+                if (Math.Abs(denom) > 1e-12)
+                {
+                    coefA = (n * sxy - sx * sy) / denom;
+                    coefB = (sy - coefA * sx) / n;
+                }
+                for (int i = 0; i < n; i++)
+                    outY[i] = coefA * xs[i] + coefB;
+            }
+            else if (calcName == "梯度下降 (AI)")
+            {
+                seriesName = "gd";
+                int iters = Math.Max(1, param);
+                double mx = 0, my = 0;
+                for (int i = 0; i < n; i++) { mx += xs[i]; my += ys[i]; }
+                mx /= n; my /= n;
+                double xstd = 0, ystd = 0;
+                for (int i = 0; i < n; i++)
+                {
+                    xstd += (xs[i] - mx) * (xs[i] - mx);
+                    ystd += (ys[i] - my) * (ys[i] - my);
+                }
+                xstd = Math.Sqrt(xstd / n);
+                ystd = Math.Sqrt(ystd / n);
+                if (xstd < 1e-12) xstd = 1e-12;
+                if (ystd < 1e-12) ystd = 1e-12;
+                double w = 0, bias = 0;
+                double lr = 0.1;
+                for (int it = 0; it < iters; it++)
+                {
+                    double gw = 0, gb = 0;
+                    for (int i = 0; i < n; i++)
+                    {
+                        double xn = (xs[i] - mx) / xstd;
+                        double yn = (ys[i] - my) / ystd;
+                        double pred = w * xn + bias;
+                        gw += (pred - yn) * xn;
+                        gb += (pred - yn);
+                    }
+                    gw = 2.0 * gw / n;
+                    gb = 2.0 * gb / n;
+                    w -= lr * gw;
+                    bias -= lr * gb;
+                }
+                for (int i = 0; i < n; i++)
+                {
+                    double xn = (xs[i] - mx) / xstd;
+                    outY[i] = (w * xn + bias) * ystd + my;
+                }
+            }
+            else if (calcName == "贝叶斯回归 (AI)")
+            {
+                seriesName = "bayes";
+                double alpha = Math.Max(1e-6, param);
+                double a00 = alpha + n, a01 = 0, a11 = alpha, b0 = 0, b1 = 0;
+                for (int i = 0; i < n; i++)
+                {
+                    a01 += xs[i];
+                    a11 += xs[i] * xs[i];
+                    b0 += ys[i];
+                    b1 += xs[i] * ys[i];
+                }
+                double det = a00 * a11 - a01 * a01;
+                double w0 = 0, w1 = 0;
+                if (Math.Abs(det) > 1e-15)
+                {
+                    w0 = (b0 * a11 - a01 * b1) / det;
+                    w1 = (a00 * b1 - a01 * b0) / det;
+                }
+                for (int i = 0; i < n; i++)
+                    outY[i] = w0 + w1 * xs[i];
+            }
+            else if (calcName == "多项式拟合 (Polyfit) (AI)")
+            {
+                int degree = param;
+                if (degree < 1) degree = 1;
+                if (degree > 10) degree = 10;
+                seriesName = "poly" + degree;
+                double[] coeff = PolyFit(xs, ys, n, degree);
+                for (int i = 0; i < n; i++)
+                {
+                    double v = 0;
+                    for (int k = 0; k <= degree; k++)
+                        v += coeff[k] * Math.Pow(xs[i], k);
+                    outY[i] = v;
+                }
+            }
+            else if (calcName == "平滑曲线 (滑动平均)")
+            {
+                seriesName = "smooth";
+                for (int i = 0; i < n; i++)
+                {
+                    int half = (param - 1) / 2;
+                    int start = Math.Max(0, i - half);
+                    int end = Math.Min(n - 1, i + half);
+                    double sum = 0;
+                    int cnt = 0;
+                    for (int k = start; k <= end; k++)
+                    {
+                        if (!double.IsNaN(ys[k])) { sum += ys[k]; cnt++; }
+                    }
+                    if (cnt > 0) outY[i] = sum / cnt;
+                }
+            }
+            else if (calcName == "线性变换 (a*y+b) (AI)")
+            {
+                seriesName = "a*y+b";
+                for (int i = 0; i < n; i++)
+                    if (!double.IsNaN(ys[i])) outY[i] = a * ys[i] + b;
+            }
+            else if (calcName == "二次变换 (a*y²+b) (AI)")
+            {
+                seriesName = "a*y²+b";
+                for (int i = 0; i < n; i++)
+                    if (!double.IsNaN(ys[i])) outY[i] = a * ys[i] * ys[i] + b;
+            }
+            else
+            {
+                seriesName = "";
+                return null;
+            }
+            return outY;
+        }
+
+        double[] PolyFit(double[] xs, double[] ys, int n, int degree)
+        {
+            int m = degree + 1;
+            double[,] a = new double[m, m];
+            double[] bvec = new double[m];
+            for (int i = 0; i < n; i++)
+            {
+                double xp = 1;
+                for (int j = 0; j < m; j++)
+                {
+                    for (int k = 0; k < m; k++)
+                        a[j, k] += xp * Math.Pow(xs[i], k);
+                    bvec[j] += xp * ys[i];
+                    xp *= xs[i];
+                }
+            }
+            return GaussSolve(a, bvec, m);
+        }
+
+        double[] GaussSolve(double[,] a, double[] b, int m)
+        {
+            for (int col = 0; col < m; col++)
+            {
+                int pivot = col;
+                double maxv = Math.Abs(a[col, col]);
+                for (int r = col + 1; r < m; r++)
+                {
+                    if (Math.Abs(a[r, col]) > maxv)
+                    {
+                        maxv = Math.Abs(a[r, col]);
+                        pivot = r;
+                    }
+                }
+                if (maxv < 1e-15)
+                {
+                    double[] zero = new double[m];
+                    return zero;
+                }
+                if (pivot != col)
+                {
+                    for (int k = col; k < m; k++)
+                    {
+                        double t = a[col, k]; a[col, k] = a[pivot, k]; a[pivot, k] = t;
+                    }
+                    double tb = b[col]; b[col] = b[pivot]; b[pivot] = tb;
+                }
+                double diag = a[col, col];
+                for (int k = col; k < m; k++) a[col, k] /= diag;
+                b[col] /= diag;
+                for (int r = 0; r < m; r++)
+                {
+                    if (r == col) continue;
+                    double f = a[r, col];
+                    if (Math.Abs(f) < 1e-15) continue;
+                    for (int k = col; k < m; k++) a[r, k] -= f * a[col, k];
+                    b[r] -= f * b[col];
+                }
+            }
+            return b;
+        }
+
+        void ClearCalcSeries()
+        {
+            foreach (string name in calcSeriesNames)
+            {
+                for (int i = chart.Series.Count - 1; i >= 0; i--)
+                {
+                    if (chart.Series[i].Name == name)
+                    {
+                        chart.Series.RemoveAt(i);
+                        break;
+                    }
+                }
+            }
+            calcSeriesNames.Clear();
+            SetStatus("已清除运算曲线", false);
+        }
+
+        static readonly string[] TimeFormats = {
+            "yyyy-MM-dd HH:mm:ss.fff", "yyyy/MM/dd HH:mm:ss.fff",
+            "yyyy-MM-dd HH:mm:ss", "yyyy/MM/dd HH:mm:ss",
+            "yyyy-M-d H:m:s", "yyyy/M/d H:m:s",
+            "yyyy-MM-dd HH:mm", "yyyy/MM/dd HH:mm",
+            "yy-MM-dd HH:mm:ss", "yy/MM/dd HH:mm:ss",
+            "yy-M-d H:m:s", "yy/M/d H:m:s",
+            "yy-MM-dd HH:mm", "yy/MM/dd HH:mm",
+            "yyyy-MM-dd", "yyyy/MM/dd", "yy-MM-dd", "yy/MM/dd",
+            "yyyyMMddHHmmss", "yyMMddHHmmss", "yyyyMMddHHmm", "yyMMddHHmm",
+            "yyyyMMdd", "yyMMdd"
+        };
+
+        static bool TryParseTime(string s, out DateTime dt)
+        {
+            dt = DateTime.MinValue;
+            string t = s.Trim();
+            if (t.Length < 6) return false;
+            return DateTime.TryParseExact(t, TimeFormats,
+                System.Globalization.CultureInfo.InvariantCulture,
+                System.Globalization.DateTimeStyles.None, out dt);
+        }
+
+        static bool IsNumeric(object o)
+        {
+            double d;
+            return TryToDouble(o, out d);
+        }
+
+        static bool TryToDouble(object o, out double val)
+        {
+            val = 0;
+            if (o is double) { val = (double)o; return true; }
+            if (o is float) { val = (float)o; return true; }
+            if (o is int) { val = (int)o; return true; }
+            if (o is long) { val = (long)o; return true; }
+            if (o is decimal) { val = (double)(decimal)o; return true; }
+            if (o is sbyte) { val = (sbyte)o; return true; }
+            if (o is byte) { val = (byte)o; return true; }
+            if (o is short) { val = (short)o; return true; }
+            if (o is ushort) { val = (ushort)o; return true; }
+            if (o is uint) { val = (uint)o; return true; }
+            if (o is ulong) { val = (ulong)o; return true; }
+            if (o is DateTime) { val = ((DateTime)o).ToOADate(); return true; }
+            if (o is TimeSpan) { val = ((TimeSpan)o).TotalSeconds; return true; }
+            return double.TryParse(o.ToString(), System.Globalization.NumberStyles.Any,
+                System.Globalization.CultureInfo.InvariantCulture, out val);
+        }
+
+        void SaveImage()
+        {
+            if (chart.Series.Count == 0)
+            {
+                MessageBox.Show(this, "请先绘制曲线", "提示");
+                return;
+            }
+            SaveFileDialog dlg = new SaveFileDialog();
+            dlg.Filter = "PNG 图片|*.png|JPEG 图片|*.jpg|BMP 图片|*.bmp";
+            dlg.FileName = "chart.png";
+            if (dlg.ShowDialog(this) == DialogResult.OK)
+            {
+                try
+                {
+                    chart.SaveImage(dlg.FileName, ChartImageFormat.Png);
+                    MessageBox.Show(this, "图片已保存到:\n" + dlg.FileName, "完成");
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(this, "保存失败: " + ex.Message, "错误",
+                        MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }
+            }
+        }
+    }
+
+    class ChartSettingsForm : Form
+    {
+        Chart chart;
+        Label lblTitleTarget;
+        MainForm owner;
+
+        TextBox txtTitle, txtXTitle, txtYTitle;
+        TextBox txtXMin, txtXMax, txtYMin, txtYMax;
+        TextBox txtXGrid, txtYGrid, txtMinorDiv;
+        CheckBox chkXLog, chkYLog, chkMinor, chkGridX, chkGridY;
+        DataGridView dgvSeries;
+
+        public ChartSettingsForm(Chart ch, Label lblTitle, MainForm ownerForm)
+        {
+            chart = ch;
+            lblTitleTarget = lblTitle;
+            owner = ownerForm;
+            Text = "图表设置";
+            FormBorderStyle = FormBorderStyle.FixedDialog;
+            MaximizeBox = false;
+            MinimizeBox = false;
+            StartPosition = FormStartPosition.CenterParent;
+            Font = new Font("Microsoft YaHei UI", 9F);
+            ClientSize = new Size(560, 480);
+
+            TabControl tabs = new TabControl();
+            tabs.Location = new Point(10, 10);
+            tabs.Size = new Size(540, 410);
+            Controls.Add(tabs);
+
+            TabPage pgGeneral = new TabPage("常规");
+            tabs.TabPages.Add(pgGeneral);
+            TabPage pgAxis = new TabPage("坐标轴");
+            tabs.TabPages.Add(pgAxis);
+            TabPage pgSeries = new TabPage("曲线样式");
+            tabs.TabPages.Add(pgSeries);
+
+            ChartArea area = chart.ChartAreas["main"];
+
+            AddRow(pgGeneral, "标题:", 16, lblTitle.Text, out txtTitle);
+            AddRow(pgGeneral, "横轴名称:", 52, area.AxisX.Title, out txtXTitle);
+            AddRow(pgGeneral, "纵轴名称:", 88, area.AxisY.Title, out txtYTitle);
+
+            AddLabelTo(pgGeneral, "图例位置:", 16, 128);
+            Label lLegendFixed = new Label();
+            lLegendFixed.Text = "固定于标题下方 (不可调)";
+            lLegendFixed.Location = new Point(110, 124);
+            lLegendFixed.AutoSize = true;
+            lLegendFixed.ForeColor = Color.FromArgb(140, 150, 160);
+            pgGeneral.Controls.Add(lLegendFixed);
+
+            AddLabelTo(pgGeneral, "横轴网格:", 16, 164);
+            chkGridX = new CheckBox();
+            chkGridX.Text = "显示";
+            chkGridX.Location = new Point(110, 160);
+            chkGridX.Checked = area.AxisX.MajorGrid.Enabled;
+            pgGeneral.Controls.Add(chkGridX);
+
+            AddLabelTo(pgGeneral, "纵轴网格:", 16, 196);
+            chkGridY = new CheckBox();
+            chkGridY.Text = "显示";
+            chkGridY.Location = new Point(110, 192);
+            chkGridY.Checked = area.AxisY.MajorGrid.Enabled;
+            pgGeneral.Controls.Add(chkGridY);
+
+            AddLabelTo(pgGeneral, "横轴网格间距:", 16, 232);
+            txtXGrid = AddSmallText(pgGeneral, 110, 228, 220);
+            txtXGrid.Text = area.AxisX.MajorGrid.Interval == 0 ? "" : area.AxisX.MajorGrid.Interval.ToString();
+
+            AddLabelTo(pgGeneral, "纵轴网格间距:", 16, 268);
+            txtYGrid = AddSmallText(pgGeneral, 110, 264, 220);
+            txtYGrid.Text = area.AxisY.MajorGrid.Interval == 0 ? "" : area.AxisY.MajorGrid.Interval.ToString();
+
+            AddLabelTo(pgGeneral, "次网格细分数:", 16, 304);
+            txtMinorDiv = AddSmallText(pgGeneral, 110, 300, 220);
+            double minorDiv = 4;
+            if (area.AxisX.MinorGrid.Enabled && area.AxisX.MajorGrid.Interval > 0)
+                minorDiv = area.AxisX.MajorGrid.Interval / area.AxisX.MinorGrid.Interval;
+            txtMinorDiv.Text = minorDiv.ToString("0.#");
+
+            chkMinor = new CheckBox();
+            chkMinor.Text = "加密网格线 (启用次网格线)";
+            chkMinor.Location = new Point(16, 334);
+            chkMinor.AutoSize = true;
+            chkMinor.Checked = area.AxisX.MinorGrid.Enabled;
+            pgGeneral.Controls.Add(chkMinor);
+
+            AddLabelTo(pgAxis, "横轴最小值 (留空=自动):", 16, 24);
+            txtXMin = AddSmallText(pgAxis, 190, 20, 150);
+            if (!double.IsNaN(area.AxisX.Minimum) && area.AxisX.Minimum != double.NegativeInfinity)
+                txtXMin.Text = area.AxisX.Minimum.ToString();
+
+            AddLabelTo(pgAxis, "横轴最大值 (留空=自动):", 16, 60);
+            txtXMax = AddSmallText(pgAxis, 190, 56, 150);
+            if (!double.IsNaN(area.AxisX.Maximum) && area.AxisX.Maximum != double.PositiveInfinity)
+                txtXMax.Text = area.AxisX.Maximum.ToString();
+
+            AddLabelTo(pgAxis, "纵轴最小值 (留空=自动):", 16, 96);
+            txtYMin = AddSmallText(pgAxis, 190, 92, 150);
+            if (!double.IsNaN(area.AxisY.Minimum) && area.AxisY.Minimum != double.NegativeInfinity)
+                txtYMin.Text = area.AxisY.Minimum.ToString();
+
+            AddLabelTo(pgAxis, "纵轴最大值 (留空=自动):", 16, 132);
+            txtYMax = AddSmallText(pgAxis, 190, 128, 150);
+            if (!double.IsNaN(area.AxisY.Maximum) && area.AxisY.Maximum != double.PositiveInfinity)
+                txtYMax.Text = area.AxisY.Maximum.ToString();
+
+            chkXLog = new CheckBox();
+            chkXLog.Text = "横轴使用对数刻度 (Log)";
+            chkXLog.Location = new Point(16, 176);
+            chkXLog.AutoSize = true;
+            chkXLog.Checked = area.AxisX.IsLogarithmic;
+            pgAxis.Controls.Add(chkXLog);
+
+            chkYLog = new CheckBox();
+            chkYLog.Text = "纵轴使用对数刻度 (Log)";
+            chkYLog.Location = new Point(16, 208);
+            chkYLog.AutoSize = true;
+            chkYLog.Checked = area.AxisY.IsLogarithmic;
+            pgAxis.Controls.Add(chkYLog);
+
+            Label lTip = new Label();
+            lTip.Text = "提示: 对数刻度要求数据均为正值";
+            lTip.Font = new Font("Microsoft YaHei UI", 8.5F);
+            lTip.ForeColor = Color.FromArgb(140, 150, 160);
+            lTip.Location = new Point(16, 240);
+            lTip.AutoSize = true;
+            pgAxis.Controls.Add(lTip);
+
+            dgvSeries = new DataGridView();
+            dgvSeries.Dock = DockStyle.Fill;
+            dgvSeries.Padding = new Padding(6);
+            dgvSeries.AllowUserToAddRows = false;
+            dgvSeries.AllowUserToDeleteRows = false;
+            dgvSeries.RowHeadersVisible = false;
+            dgvSeries.BackgroundColor = Color.White;
+            dgvSeries.BorderStyle = BorderStyle.FixedSingle;
+            dgvSeries.EnableHeadersVisualStyles = false;
+            dgvSeries.ColumnHeadersDefaultCellStyle.BackColor = Color.FromArgb(52, 73, 94);
+            dgvSeries.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
+            dgvSeries.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
+            dgvSeries.ColumnHeadersHeight = 26;
+            dgvSeries.DefaultCellStyle.Font = new Font("Microsoft YaHei UI", 8.5F);
+            dgvSeries.GridColor = Color.FromArgb(221, 228, 236);
+            dgvSeries.RowTemplate.Height = 26;
+            pgSeries.Controls.Add(dgvSeries);
+
+            DataGridViewTextBoxColumn cName = new DataGridViewTextBoxColumn();
+            cName.HeaderText = "曲线名称";
+            cName.Width = 130;
+            cName.ReadOnly = true;
+            dgvSeries.Columns.Add(cName);
+
+            DataGridViewComboBoxColumn cColor = new DataGridViewComboBoxColumn();
+            cColor.HeaderText = "颜色";
+            cColor.Width = 90;
+            cColor.FlatStyle = FlatStyle.Flat;
+            foreach (KnownColor kc in Enum.GetValues(typeof(KnownColor)))
+            {
+                Color cc = Color.FromKnownColor(kc);
+                if (cc.IsSystemColor || cc.A != 255) continue;
+                cColor.Items.Add(kc.ToString());
+            }
+            dgvSeries.Columns.Add(cColor);
+
+            DataGridViewComboBoxColumn cWidth = new DataGridViewComboBoxColumn();
+            cWidth.HeaderText = "线宽";
+            cWidth.Width = 60;
+            cWidth.FlatStyle = FlatStyle.Flat;
+            for (int i = 1; i <= 8; i++) cWidth.Items.Add(i.ToString());
+            dgvSeries.Columns.Add(cWidth);
+
+            DataGridViewComboBoxColumn cStyle = new DataGridViewComboBoxColumn();
+            cStyle.HeaderText = "线型";
+            cStyle.Width = 80;
+            cStyle.FlatStyle = FlatStyle.Flat;
+            cStyle.Items.Add("实线");
+            cStyle.Items.Add("虚线");
+            cStyle.Items.Add("点线");
+            cStyle.Items.Add("点划线");
+            dgvSeries.Columns.Add(cStyle);
+
+            DataGridViewComboBoxColumn cMarker = new DataGridViewComboBoxColumn();
+            cMarker.HeaderText = "标记";
+            cMarker.Width = 80;
+            cMarker.FlatStyle = FlatStyle.Flat;
+            cMarker.Items.Add("无");
+            cMarker.Items.Add("圆点");
+            cMarker.Items.Add("方块");
+            cMarker.Items.Add("三角");
+            cMarker.Items.Add("菱形");
+            dgvSeries.Columns.Add(cMarker);
+
+            RefreshSeriesGrid();
+
+            Button ok = new Button();
+            ok.Text = "应用";
+            ok.Location = new Point(250, 432);
+            ok.Size = new Size(120, 34);
+            ok.FlatStyle = FlatStyle.Flat;
+            ok.FlatAppearance.BorderSize = 0;
+            ok.BackColor = Color.FromArgb(41, 101, 173);
+            ok.ForeColor = Color.White;
+            ok.Font = new Font("Microsoft YaHei UI", 10F, FontStyle.Bold);
+            ok.Click += delegate { ApplyAndClose(); };
+            Controls.Add(ok);
+
+            Button cancel = new Button();
+            cancel.Text = "取消";
+            cancel.Location = new Point(385, 432);
+            cancel.Size = new Size(120, 34);
+            cancel.DialogResult = DialogResult.Cancel;
+            Controls.Add(cancel);
+            AcceptButton = ok;
+            CancelButton = cancel;
+        }
+
+        void RefreshSeriesGrid()
+        {
+            dgvSeries.Rows.Clear();
+            foreach (Series s in chart.Series)
+            {
+                int idx = dgvSeries.Rows.Add();
+                dgvSeries.Rows[idx].Cells[0].Value = s.Name;
+                dgvSeries.Rows[idx].Cells[1].Value = s.Color.Name;
+                dgvSeries.Rows[idx].Cells[2].Value = s.BorderWidth.ToString();
+                dgvSeries.Rows[idx].Cells[3].Value = StyleToCn(s.BorderDashStyle);
+                dgvSeries.Rows[idx].Cells[4].Value = MarkerToCn(s.MarkerStyle);
+            }
+        }
+
+        static string StyleToCn(ChartDashStyle st)
+        {
+            switch (st)
+            {
+                case ChartDashStyle.Dash: return "虚线";
+                case ChartDashStyle.Dot: return "点线";
+                case ChartDashStyle.DashDot: return "点划线";
+                default: return "实线";
+            }
+        }
+
+        static string MarkerToCn(MarkerStyle m)
+        {
+            switch (m)
+            {
+                case MarkerStyle.Circle: return "圆点";
+                case MarkerStyle.Square: return "方块";
+                case MarkerStyle.Triangle: return "三角";
+                case MarkerStyle.Diamond: return "菱形";
+                default: return "无";
+            }
+        }
+
+        static ChartDashStyle CnToStyle(string s)
+        {
+            if (s == "虚线") return ChartDashStyle.Dash;
+            if (s == "点线") return ChartDashStyle.Dot;
+            if (s == "点划线") return ChartDashStyle.DashDot;
+            return ChartDashStyle.Solid;
+        }
+
+        static MarkerStyle CnToMarker(string s)
+        {
+            if (s == "圆点") return MarkerStyle.Circle;
+            if (s == "方块") return MarkerStyle.Square;
+            if (s == "三角") return MarkerStyle.Triangle;
+            if (s == "菱形") return MarkerStyle.Diamond;
+            return MarkerStyle.None;
+        }
+
+        void AddLabelTo(Control parent, string text, int x, int y)
+        {
+            Label l = new Label();
+            l.Text = text;
+            l.Location = new Point(x, y + 4);
+            l.AutoSize = true;
+            l.ForeColor = Color.FromArgb(60, 70, 80);
+            parent.Controls.Add(l);
+        }
+
+        void AddRow(Control parent, string label, int y, string value, out TextBox box)
+        {
+            AddLabelTo(parent, label, 16, y);
+            box = new TextBox();
+            box.Location = new Point(110, y);
+            box.Width = 220;
+            box.BorderStyle = BorderStyle.FixedSingle;
+            box.Text = value;
+            parent.Controls.Add(box);
+        }
+
+        TextBox AddSmallText(Control parent, int x, int y, int width)
+        {
+            TextBox t = new TextBox();
+            t.Location = new Point(x, y);
+            t.Width = width;
+            t.BorderStyle = BorderStyle.FixedSingle;
+            parent.Controls.Add(t);
+            return t;
+        }
+
+        void ApplyAndClose()
+        {
+            ChartArea area = chart.ChartAreas["main"];
+            lblTitleTarget.Text = txtTitle.Text.Trim();
+            area.AxisX.Title = txtXTitle.Text.Trim();
+            area.AxisY.Title = txtYTitle.Text.Trim();
+
+            double xGrid = 0, yGrid = 0;
+            if (double.TryParse(txtXGrid.Text.Trim(), out xGrid) && xGrid > 0)
+                area.AxisX.MajorGrid.Interval = xGrid;
+            else
+                area.AxisX.MajorGrid.Interval = 0;
+            if (double.TryParse(txtYGrid.Text.Trim(), out yGrid) && yGrid > 0)
+                area.AxisY.MajorGrid.Interval = yGrid;
+            else
+                area.AxisY.MajorGrid.Interval = 0;
+
+            area.AxisX.MajorGrid.Enabled = chkGridX.Checked;
+            area.AxisY.MajorGrid.Enabled = chkGridY.Checked;
+
+            double xMin, xMax, yMin, yMax;
+            if (double.TryParse(txtXMin.Text.Trim(), out xMin))
+                area.AxisX.Minimum = xMin;
+            else
+                area.AxisX.Minimum = double.NaN;
+            if (double.TryParse(txtXMax.Text.Trim(), out xMax))
+                area.AxisX.Maximum = xMax;
+            else
+                area.AxisX.Maximum = double.NaN;
+            if (double.TryParse(txtYMin.Text.Trim(), out yMin))
+                area.AxisY.Minimum = yMin;
+            else
+                area.AxisY.Minimum = double.NaN;
+            if (double.TryParse(txtYMax.Text.Trim(), out yMax))
+                area.AxisY.Maximum = yMax;
+            else
+                area.AxisY.Maximum = double.NaN;
+
+            area.AxisX.IsLogarithmic = chkXLog.Checked;
+            area.AxisY.IsLogarithmic = chkYLog.Checked;
+
+            bool minor = chkMinor.Checked;
+            double div = 4;
+            double.TryParse(txtMinorDiv.Text.Trim(), out div);
+            if (div < 2) div = 2;
+            area.AxisX.MinorGrid.Enabled = minor;
+            area.AxisY.MinorGrid.Enabled = minor;
+            if (minor)
+            {
+                Color minorColor = Color.FromArgb(215, 220, 228);
+                if (xGrid > 0)
+                    area.AxisX.MinorGrid.Interval = xGrid / div;
+                else
+                    area.AxisX.MinorGrid.Interval = 0;
+                if (yGrid > 0)
+                    area.AxisY.MinorGrid.Interval = yGrid / div;
+                else
+                    area.AxisY.MinorGrid.Interval = 0;
+                area.AxisX.MinorGrid.LineColor = minorColor;
+                area.AxisY.MinorGrid.LineColor = minorColor;
+                area.AxisX.MinorGrid.LineDashStyle = ChartDashStyle.Dash;
+                area.AxisY.MinorGrid.LineDashStyle = ChartDashStyle.Dash;
+            }
+
+            foreach (DataGridViewRow row in dgvSeries.Rows)
+            {
+                if (row.IsNewRow) continue;
+                string sname = row.Cells[0].Value == null ? "" : row.Cells[0].Value.ToString();
+                if (chart.Series.IndexOf(sname) < 0) continue;
+                Series s = chart.Series[sname];
+                string colorName = row.Cells[1].Value == null ? "" : row.Cells[1].Value.ToString();
+                if (colorName.Length > 0)
+                {
+                    try { s.Color = Color.FromName(colorName); }
+                    catch { }
+                }
+                int bw = 2;
+                int.TryParse(row.Cells[2].Value == null ? "2" : row.Cells[2].Value.ToString(), out bw);
+                s.BorderWidth = bw;
+                string style = row.Cells[3].Value == null ? "" : row.Cells[3].Value.ToString();
+                if (style.Length > 0) s.BorderDashStyle = CnToStyle(style);
+                string marker = row.Cells[4].Value == null ? "" : row.Cells[4].Value.ToString();
+                if (marker.Length > 0)
+                {
+                    s.MarkerStyle = CnToMarker(marker);
+                    s.MarkerSize = 6;
+                    s.MarkerColor = s.Color;
+                }
+            }
+            chart.Invalidate();
+            DialogResult = DialogResult.OK;
+            Close();
+        }
+    }
+}
diff --git a/README.txt b/README.txt
new file mode 100644
index 0000000..f6c78cd
--- /dev/null
+++ b/README.txt
@@ -0,0 +1,277 @@
+================================================================================
+趋势预测分析工具 ChartAnalysis - 使用教学与部署说明
+================================================================================
+
+目录
+--------------------------------------------------------------------------------
+  一、程序简介与功能总览
+  二、运行环境要求
+  三、部署文件清单
+  四、快速上手（5 步出图）
+  五、界面布局说明
+  六、详细操作教学
+  七、config.ini 配置说明
+  八、测试模式（开发用）
+  九、常见问题 FAQ
+  十、源码与重新编译
+
+================================================================================
+一、程序简介与功能总览
+================================================================================
+
+ChartAnalysis.exe 是一个连接 MySQL 数据库的趋势分析与预测绘图工具。
+单文件绿色程序（C# WinForms 编写），无需安装、无需任何运行库。
+
+主要功能：
+--------------------------------------------------------------------------------
+  1. 数据库连接: 连接任意 MySQL 5.5~8.x 服务器，浏览数据库/表/列结构。
+  2. 灵活查询:   X 轴单选、Y 轴多选、过滤规则、排序方向、条数/偏移/起点控制。
+  3. 智能绘图:   自动识别时间(X)轴（23 种时间格式），支持数值轴/文本轴。
+  4. 运算曲线:   13 种数学运算（含 6 种 AI 算法），可叠加在原始曲线上。
+  5. 图表交互:   十字准线、点击数据点查看数值、图例固定显示、图表设置。
+  6. 图片导出:   一键保存 PNG / JPG / BMP 图片。
+  7. 窗口自适应: 左侧配置面板可拖拽宽度，控件随宽度自动伸缩布局。
+
+================================================================================
+二、运行环境要求
+================================================================================
+
+  1. 操作系统: Windows 7 SP1 / 8 / 8.1 / 10 / 11（32/64 位均可）。
+     - 注意: Windows 7 必须为 SP1 或以上版本。
+  2. .NET Framework: 4.6.2 或更高（推荐 4.8）。
+     - Win10 / 11 系统自带 4.8，开箱即用，无需安装。
+     - Win7 SP1 / 8 / 8.1 若缺失，用 Start.bat 启动会自动下载安装。
+  3. 数据库: MySQL 5.5 ~ 8.x（本机或远程服务器均可）。
+     - MySQL 连接驱动已内嵌进 exe，客户端无需安装任何驱动或 ODBC。
+  4. 无需安装: 不依赖 VC++ 运行库、Java、Python 等其他任何组件。
+
+================================================================================
+三、部署文件清单
+================================================================================
+
+  [必需] ChartAnalysis.exe   主程序（单文件，约 1.5MB）
+  [必需] config.ini          数据库连接配置（与 exe 同目录）
+
+  [可选] Start.bat           引导启动器: 自动检测并安装 .NET Framework，
+                             解决"没有 .NET 环境"电脑无法运行的问题。
+                             Win7 SP1 ~ Win11 全兼容。
+  [可选] README.txt          本说明文档
+
+  发布时只需 exe + config.ini 两个文件即可运行。
+
+================================================================================
+四、快速上手（5 步出图）
+================================================================================
+
+  第 1 步: 双击 ChartAnalysis.exe（或用 Start.bat）启动程序。
+  第 2 步: 左侧"服务器连接"区填好 主机/端口/用户名/密码，点击"连 接"。
+           （config.ini 已配置时自动填入，可直接连接）
+  第 3 步: 连接后自动加载数据库列表，选中数据库后自动加载表列表；
+           再选"存储表"→ 自动加载全部列；指定"横坐标"（X 轴）；
+           按住 Ctrl 键多选"纵坐标"（Y 轴曲线）。
+  第 4 步: 按需设置过滤规则 / 排序 / 条数等，点击"绘制曲线"。
+  第 5 步: 等待查询完成，图表自动渲染；可继续叠加运算曲线或保存图片。
+
+================================================================================
+五、界面布局说明
+================================================================================
+
+┌────────────┬──────────────────────────────────────────────┐
+│ 折叠 | 钉住 │ 标题栏 (表名 曲线图)                         │
+│ ────────── │ 图例条 (色块+曲线名, 固定在标题下方)          │
+│ 服务器连接 │ 工具栏: 曲线 | 运算 | 参数 | 生成/清除/图例/设置/十字线 │
+│ 排序规则   │                                              │
+│ 存储表坐标 │              图表绘图区                       │
+│ 过滤规则   │        (十字线/点击数据点/缩放自由)           │
+│ 绘制/保存  │                                              │
+└────────────┴──────────────────────────────────────────────┘
+
+  左侧配置面板: 可拖动中间分隔条改变宽度 (380~800px)。
+     - 面板宽度 >= 380px 时，控件宽度随面板自适应伸缩；
+     - 面板拖到 380px 以下时，控件保持最小布局，右侧开始被遮蔽
+       （出现横向滚动条）。
+  折叠按钮: 隐藏左侧面板，腾出整个窗口给图表；点"展开配置"恢复。
+  钉住按钮: 锁定左侧面板宽度，拖动分隔条不再生效。
+
+================================================================================
+六、详细操作教学
+================================================================================
+
+6.1 服务器连接
+--------------------------------------------------------------------------------
+  - 主机地址 / 端口 / 用户名 / 密码: 直接填写；密码框为掩码输入。
+  - DB 下拉框: 支持输入过滤，回车或选中即加载该库的表。
+  - 点"连 接": 连接服务器并刷新数据库列表（自动选中 config.ini 中的库）。
+  - 连接信息会自动保存到 config.ini，下次启动自动填入。
+
+6.2 排序规则
+--------------------------------------------------------------------------------
+  - 方向: 正序(最早在前) / 倒序(最新在前)，默认正序。
+    * 注意: 无论哪种方向，图表 X 轴始终按时间(数值)从左到右递增显示。
+      倒序模式 = 只取最新的 N 条数据来画图。
+  - 条数: 查询多少行，默认 2000（0 = 不限制）。
+  - 偏移: 跳过前 N 行（从最早/最新一侧开始跳，跟随排序方向）。
+  - 起点: 从最新数据往回数 N 条作为查询起点，再取"条数"行。
+    例: 条数=2000、起点=5000 → 取倒数第 5000 条往前共 2000 条数据。
+
+6.3 存储表与坐标轴
+--------------------------------------------------------------------------------
+  - 存储表: 选择要查询的表，自动列出所有列。
+  - 横坐标: 单选 X 轴列（时间列 / 数值列 / 文本列均可自动识别）。
+  - 纵坐标: 按住 Ctrl 可多选，画多条曲线。
+    提示: 下方小字"提示: 按住 Ctrl 键可多选纵坐标"。
+
+6.4 过滤规则（多行按 AND/OR 连接）
+--------------------------------------------------------------------------------
+  每行规则由 4 列组成: 列 | 操作符 | 值 | 逻辑。
+  - 操作符: =  !=  >  >=  <  <=  LIKE  BETWEEN  IS NULL  IS NOT NULL
+  - 值: 普通条件直接填值；BETWEEN 用逗号分隔两个值，如 10,20；
+        LIKE 可直接写 % 通配符，如 'AB%' 可填 AB%。
+  - 逻辑: 该行与下一行之间的连接方式，AND 或 OR，默认 AND。
+    例:
+      列=类型  =   设备1    AND
+      列=温度  >=  100      OR
+      列=压力  <=  5
+    等价 SQL: WHERE 类型='设备1' AND 温度>=100 OR 压力<=5
+  - 按钮: "+ 添加规则" 加一行；"- 删除" 删选中行；"清空" 删除全部。
+  - 注意: 多行混用 AND/OR 时按行顺序连接，建议用括号语义自行组织顺序。
+
+6.5 绘制曲线与保存图片
+--------------------------------------------------------------------------------
+  - "绘制曲线": 后台线程查询并渲染，期间按钮禁用，完成后状态栏提示。
+  - "保存图片": 弹出保存对话框，可选 PNG / JPG / BMP 格式。
+
+6.6 图表交互
+--------------------------------------------------------------------------------
+  (1) 十字准线: 鼠标移入绘图区，显示跟随鼠标的灰色虚线十字架；
+      离开绘图区自动消失。工具栏"隐藏十字线/显示十字线"可开关。
+  (2) 点击数据点: 鼠标左键点击曲线上的数据点，弹出浮动信息窗，显示:
+      曲线名 / X 值 / Y 值 / 数据序号。
+      时间 X 轴自动格式化为 yyyy-MM-dd HH:mm:ss。
+      点击图表空白处或切换窗口自动关闭。
+  (3) 图例: 固定在标题下方，色块+曲线名，自动换行、高度自适应。
+      工具栏"隐藏图例/显示图例"可开关。
+  (4) 工具栏:
+      - 曲线: 选择目标曲线（仅"线性变换/二次变换"需要指定）。
+      - 运算: 选择运算类型（详见 6.7）。
+      - 参数: 输入所选运算的参数（窗口/阶数/迭代/α/a,b）。
+      - "生成运算曲线": 对已绘制曲线执行运算并叠加显示。
+      - "清除运算": 移除全部运算曲线。
+      - "图表设置": 打开设置对话框（详见 6.8）。
+
+6.7 运算功能详解（13 种，按拼音排序）
+--------------------------------------------------------------------------------
+  运算列表（默认选中"平滑曲线"）:
+
+  名称                          参数      说明
+  ─────────────────────────────────────────────────────────────
+  贝叶斯回归 (AI)               α:1      带正则的贝叶斯线性回归，α 越大曲线越平缓
+  常用对数 (log10)              -        对 Y 值取以 10 为底的对数（需 Y>0）
+  对数 (ln)                     -        对 Y 值取自然对数（需 Y>0）
+  多项式拟合 (Polyfit) (AI)     阶数:3    最小二乘多项式拟合，阶数 1~10
+  二次变换 (a*y²+b) (AI)        a,b:1,0  对指定曲线做二次变换
+  积分 (累积)                   -        梯形法累积积分（∫ydx）
+  开方 (sqrt)                   -        对 Y 值开平方（需 Y>=0）
+  平滑曲线 (滑动平均)           窗口:5    滑动平均滤波，窗口 3~101（奇数值）
+  梯度下降 (AI)            迭代:200  数据归一化后用梯度下降迭代拟合回归线
+  微分 (差分)                   -        一阶差分 dy/dx
+  线性回归 (AI)                 -        最小二乘线性回归直线
+  线性变换 (a*y+b) (AI)         a,b:1,0  对指定曲线做线性变换
+  指数 (exp)                    -        对 Y 值取指数
+
+  - 使用步骤: 先"绘制曲线"→ 选择运算与参数 → "生成运算曲线"。
+  - "线性变换/二次变换"需先在"曲线"下拉框指定目标曲线（变换只作用于
+    该曲线，其余运算对全部曲线各生成一条结果）。
+  - (AI) 标记: 表示智能拟合/迭代类算法。
+
+6.8 图表设置对话框
+--------------------------------------------------------------------------------
+  "常规"页:
+    - 标题 / 横轴名称 / 纵轴名称（修改立即应用于图表）。
+    - 图例位置: 固定于标题下方（不可调）。
+    - 横轴/纵轴网格: 显示开关 + 网格间距（留空 = 自动）。
+    - 次网格: 加密网格线开关 + 细分数（默认 4 等分）。
+  "坐标轴"页:
+    - 横轴/纵轴最小/最大值: 留空 = 自动。
+    - 横轴/纵轴对数刻度 (Log): 要求数据均为正值。
+  "曲线样式"页:
+    - 逐条曲线设置: 颜色 / 线宽(1~8) / 线型(实线/虚线/点线/点划线) /
+      标记(无/圆点/方块/三角/菱形)。
+  - 点"应用"生效并关闭；"取消"放弃修改。
+
+================================================================================
+七、config.ini 配置说明
+================================================================================
+
+  [mysql]
+  host = 127.0.0.1     数据库服务器地址 (远程填 IP 或域名)
+  port = 3306          端口
+  user = root          用户名
+  password =           密码
+  database =           数据库名
+  charset = utf8mb4    字符集
+
+  - 也可在程序界面的"连接"区直接填写，点"连接"后自动保存到本文件。
+  - 首次运行没有 config.ini 时程序按默认值 (127.0.0.1/3306/root/空) 启动。
+
+================================================================================
+八、测试模式（开发用）
+================================================================================
+
+  ChartAnalysis.exe --selftest   自检: 连接数据库、枚举表/列、查询数据，
+                                  结果写入 selftest_result.txt
+  ChartAnalysis.exe --drawtest   绘图测试: 用数据库中第一张表画 1 条曲线，
+                                  导出 drawtest.png 验证图表渲染
+
+================================================================================
+九、常见问题 FAQ
+================================================================================
+
+Q1. 双击 exe 无反应/报错提示缺少 .NET Framework?
+A1. 用 Start.bat 启动会自动安装 .NET 4.8；或按第二节手动安装。
+
+Q2. 报错"无法连接数据库"?
+A2. 检查 config.ini 或界面中填写的地址/端口/账号/密码/数据库名是否正确，
+    并确认服务器防火墙放行了对应端口（默认 3306）。
+
+Q3. Win7 安装 .NET 4.8 失败?
+A3. 确认系统是 Win7 SP1，且已安装最新 Windows Update 补丁。
+    .NET 4.8 官方最低支持 Win7 SP1。
+
+Q4. 查询很慢或图表点很多很卡?
+A4. 在"条数"里减小查询行数（如 500/1000）；或配合"起点"只看最近一段。
+
+Q5. 为什么方向选"倒序"后图表还是从左到右时间递增?
+A5. 这是正常设计: 图表 X 轴始终按时间递增显示，"倒序"仅表示取最新的
+    数据段来画图（等价于只查看最近 N 条）。
+
+Q6. 对数刻度 / 对数运算为什么有的点不显示?
+A6. 对数要求数值为正；sqrt 要求非负。非法点会被自动跳过，曲线相应断开。
+
+Q7. 左侧面板变窄后控件看不全?
+A7. 面板小于 380px 时控件保持最小布局并出现横向滚动条，属设计行为；
+    拖宽面板即可完整显示。
+
+================================================================================
+十、源码与重新编译（开发用）
+================================================================================
+
+  Program.cs           主程序源码（C#，单文件，含全部窗体逻辑）
+  tools\ref\           .NET 4.6.2 参考程序集（编译时引用）
+  lib\                 依赖 DLL（编译时内嵌进 exe）
+  build.bat            一键重新编译 ChartAnalysis.exe（本机需装 .NET 4.x）
+  config.ini           数据库连接配置
+
+  编译命令: 双击 build.bat，或命令行执行:
+      build.bat
+  产物: ChartAnalysis.exe（内嵌 MySqlConnector 等 10 个 DLL 及程序图标）
+
+  依赖 DLL 明细（已内嵌，仅供说明）:
+    MySqlConnector.dll、Microsoft.Bcl.AsyncInterfaces.dll、
+    Microsoft.Extensions.DependencyInjection.Abstractions.dll、
+    Microsoft.Extensions.Logging.Abstractions.dll、System.Buffers.dll、
+    System.Diagnostics.DiagnosticSource.dll、System.Memory.dll、
+    System.Numerics.Vectors.dll、System.Runtime.CompilerServices.Unsafe.dll、
+    System.Threading.Tasks.Extensions.dll
+
+================================================================================
diff --git a/Start.bat b/Start.bat
new file mode 100644
index 0000000..1c4c2e8
--- /dev/null
+++ b/Start.bat
@@ -0,0 +1,71 @@
+@echo off
+setlocal EnableDelayedExpansion
+title Trend Chart Launcher
+set "APP_DIR=%~dp0"
+set "APP_EXE=%APP_DIR%ChartAnalysis.exe"
+
+if not exist "%APP_EXE%" (
+    echo [ERROR] ChartAnalysis.exe not found in this folder.
+    pause
+    exit /b 1
+)
+
+echo Checking .NET Framework version...
+
+set "RELHEX="
+for /f "tokens=3" %%v in ('reg query "HKLM\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full" /v Release 2^>nul') do set "RELHEX=%%v"
+
+if defined RELHEX (
+    set /a RELDEC=RELHEX 2>nul
+    if defined RELDEC (
+        if !RELDEC! GEQ 394806 (
+            echo [OK] .NET Framework 4.6.2+ detected. Starting program...
+            start "" "%APP_EXE%"
+            exit /b 0
+        )
+    )
+)
+
+echo.
+echo [INFO] .NET Framework 4.6.2 or higher is required.
+echo        This launcher will download and install .NET Framework 4.8
+echo        (supports Windows 7 SP1 to Windows 11), then start the program.
+echo.
+echo Downloading .NET Framework 4.8 (about 120MB)...
+set "DOTNET_URL=https://go.microsoft.com/fwlink/?linkid=2088631"
+set "INSTALLER=%TEMP%\dotnetfx48_setup.exe"
+
+powershell -NoProfile -ExecutionPolicy Bypass -Command ^
+  "$ErrorActionPreference='Stop'; [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $wc = New-Object System.Net.WebClient; $wc.DownloadFile('%DOTNET_URL%','%INSTALLER%')"
+
+if not exist "%INSTALLER%" (
+    echo.
+    echo [FAILED] Download failed. Please install manually:
+    echo        https://dotnet.microsoft.com/download/dotnet-framework/net48
+    echo        Then run Start.bat again.
+    start "" "https://dotnet.microsoft.com/download/dotnet-framework/net48"
+    pause
+    exit /b 1
+)
+
+echo Installing .NET Framework 4.8 silently, please wait...
+"%INSTALLER%" /q /norestart
+set "RC=%ERRORLEVEL%"
+
+if %RC% NEQ 0 (
+    echo.
+    echo [WARN] Installer returned code %RC% (0 = success).
+    if %RC% EQU 3010 (
+        echo Reboot required. Please restart the computer, then run Start.bat again.
+        pause
+        exit /b 1
+    )
+    echo Installation may have failed. Please retry after reboot.
+    pause
+    exit /b 1
+)
+
+echo.
+echo [DONE] .NET Framework ready. Starting program...
+start "" "%APP_EXE%"
+exit /b 0
\ No newline at end of file
diff --git a/build.bat b/build.bat
new file mode 100644
index 0000000..bf614ea
--- /dev/null
+++ b/build.bat
@@ -0,0 +1,57 @@
+@echo off
+setlocal
+title Build ChartAnalysis.exe
+
+set "APP_DIR=%~dp0"
+set "CSC=C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"
+if not exist "%CSC%" set "CSC=C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
+
+if not exist "%CSC%" (
+    echo [ERROR] csc.exe not found. .NET Framework 4.x required to build.
+    pause
+    exit /b 1
+)
+
+set "REF=%APP_DIR%tools\ref"
+set "LIB=%APP_DIR%lib"
+
+echo Building ChartAnalysis.exe ...
+pushd "%LIB%"
+
+"%CSC%" /nologo /noconfig /nostdlib+ /target:winexe /platform:anycpu /optimize+ ^
+  /out:"%APP_DIR%ChartAnalysis.exe" ^
+  /reference:"%REF%\mscorlib.dll" ^
+  /reference:"%REF%\System.dll" ^
+  /reference:"%REF%\System.Core.dll" ^
+  /reference:"%REF%\System.Data.dll" ^
+  /reference:"%REF%\System.Drawing.dll" ^
+  /reference:"%REF%\System.Windows.Forms.dll" ^
+  /reference:"%REF%\System.Windows.Forms.DataVisualization.dll" ^
+  /reference:"%LIB%\MySqlConnector.dll" ^
+  /resource:"%LIB%\MySqlConnector.dll" ^
+  /resource:"%LIB%\Microsoft.Extensions.Logging.Abstractions.dll" ^
+  /resource:"%LIB%\Microsoft.Extensions.DependencyInjection.Abstractions.dll" ^
+  /resource:"%LIB%\System.Diagnostics.DiagnosticSource.dll" ^
+  /resource:"%LIB%\System.Threading.Tasks.Extensions.dll" ^
+  /resource:"%LIB%\System.Runtime.CompilerServices.Unsafe.dll" ^
+  /resource:"%LIB%\Microsoft.Bcl.AsyncInterfaces.dll" ^
+  /resource:"%LIB%\System.Memory.dll" ^
+  /resource:"%LIB%\System.Buffers.dll" ^
+  /resource:"%LIB%\System.Numerics.Vectors.dll" ^
+  /win32icon:"%APP_DIR%hamster.ico" ^
+  /resource:"%APP_DIR%hamster.ico" ^
+  "%APP_DIR%Program.cs"
+
+set "RC=%ERRORLEVEL%"
+popd
+
+if %RC% NEQ 0 (
+    echo [FAILED] Build failed. See errors above.
+    pause
+    exit /b 1
+)
+
+echo [OK] Built: %APP_DIR%ChartAnalysis.exe
+echo      Target: .NET Framework 4.6.2 (Win7 SP1 - Win11)
+pause
+exit /b 0
\ No newline at end of file
diff --git a/config.ini b/config.ini
new file mode 100644
index 0000000..203d677
--- /dev/null
+++ b/config.ini
@@ -0,0 +1,7 @@
+[mysql]
+host = 47.116.138.143
+port = 6436
+user = sdbc
+password = sdbc@88031111
+database = sdbc_datalog
+charset = utf8mb4
diff --git a/drawtest.png b/drawtest.png
new file mode 100644
index 0000000..2ad20b0
Binary files /dev/null and b/drawtest.png differ
diff --git a/hamster.ico b/hamster.ico
new file mode 100644
index 0000000..b05bf45
Binary files /dev/null and b/hamster.ico differ
diff --git a/lib/Microsoft.Bcl.AsyncInterfaces.dll b/lib/Microsoft.Bcl.AsyncInterfaces.dll
new file mode 100644
index 0000000..6031ba1
Binary files /dev/null and b/lib/Microsoft.Bcl.AsyncInterfaces.dll differ
diff --git a/lib/Microsoft.Extensions.DependencyInjection.Abstractions.dll b/lib/Microsoft.Extensions.DependencyInjection.Abstractions.dll
new file mode 100644
index 0000000..9428609
Binary files /dev/null and b/lib/Microsoft.Extensions.DependencyInjection.Abstractions.dll differ
diff --git a/lib/Microsoft.Extensions.Logging.Abstractions.dll b/lib/Microsoft.Extensions.Logging.Abstractions.dll
new file mode 100644
index 0000000..dfa6c44
Binary files /dev/null and b/lib/Microsoft.Extensions.Logging.Abstractions.dll differ
diff --git a/lib/MySqlConnector.dll b/lib/MySqlConnector.dll
new file mode 100644
index 0000000..16968c6
Binary files /dev/null and b/lib/MySqlConnector.dll differ
diff --git a/lib/System.Buffers.dll b/lib/System.Buffers.dll
new file mode 100644
index 0000000..f2d83c5
Binary files /dev/null and b/lib/System.Buffers.dll differ
diff --git a/lib/System.Diagnostics.DiagnosticSource.dll b/lib/System.Diagnostics.DiagnosticSource.dll
new file mode 100644
index 0000000..b58b31a
Binary files /dev/null and b/lib/System.Diagnostics.DiagnosticSource.dll differ
diff --git a/lib/System.Memory.dll b/lib/System.Memory.dll
new file mode 100644
index 0000000..4617199
Binary files /dev/null and b/lib/System.Memory.dll differ
diff --git a/lib/System.Numerics.Vectors.dll b/lib/System.Numerics.Vectors.dll
new file mode 100644
index 0000000..0865972
Binary files /dev/null and b/lib/System.Numerics.Vectors.dll differ
diff --git a/lib/System.Runtime.CompilerServices.Unsafe.dll b/lib/System.Runtime.CompilerServices.Unsafe.dll
new file mode 100644
index 0000000..c5ba4e4
Binary files /dev/null and b/lib/System.Runtime.CompilerServices.Unsafe.dll differ
diff --git a/lib/System.Threading.Tasks.Extensions.dll b/lib/System.Threading.Tasks.Extensions.dll
new file mode 100644
index 0000000..eeec928
Binary files /dev/null and b/lib/System.Threading.Tasks.Extensions.dll differ
diff --git a/selftest_result.txt b/selftest_result.txt
new file mode 100644
index 0000000..a6fcc31
--- /dev/null
+++ b/selftest_result.txt
@@ -0,0 +1,3 @@
+查询行数: 300
+图表已保存 drawtest.png, 系列数=1, 图例启用=True
+DRAWTEST PASS
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