具有行号的Windows窗体文本框？

Question

我正在为我正在编写的应用程序寻找一个免费的winforms组件。我基本上需要一个包含侧栏中行号的文本框。能够将数据制成表格也是一个重要的优势。

有没有人知道可以做到这一点的预制组件？

Answer 1

引用Wayne's post，这是相关代码。它使用GDI在文本框旁边绘制行号。

Public Sub New()
    MyBase.New()

    'This call is required by the Windows Form Designer.
    InitializeComponent()

    'Add any initialization after the InitializeComponent() call
    SetStyle(ControlStyles.UserPaint, True)
    SetStyle(ControlStyles.AllPaintingInWmPaint, True)
    SetStyle(ControlStyles.DoubleBuffer, True)
    SetStyle(ControlStyles.ResizeRedraw, True)
End Sub

Private Sub RichTextBox1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RichTextBox1.SelectionChanged
    FindLine()
    Invalidate()
End Sub

Private Sub FindLine()
    Dim intChar As Integer

    intChar = RichTextBox1.GetCharIndexFromPosition(New Point(0, 0))
    intLine = RichTextBox1.GetLineFromCharIndex(intChar)
End Sub

Private Sub DrawLines(ByVal g As Graphics, ByVal intLine As Integer)
    Dim intCounter As Integer, intY As Integer

    g.Clear(Color.Black)

    intCounter = intLine + 1
    intY = 2
    Do
        g.DrawString(intCounter.ToString(), Font, Brushes.White, 3, intY)
        intCounter += 1

        intY += Font.Height + 1
        If intY > ClientRectangle.Height - 15 Then Exit Do
    Loop
End Sub

Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
    DrawLines(e.Graphics, intLine)
End Sub

Private Sub RichTextBox1_VScroll(ByVal sender As Object, ByVal e As System.EventArgs) Handles RichTextBox1.VScroll
    FindLine()
    Invalidate()
End Sub

Private Sub RichTextBox1_UserScroll() Handles RichTextBox1.UserScroll
    FindLine()
    Invalidate()
End Sub

RichTextBox被覆盖如下：

Public Class UserControl1
Inherits System.Windows.Forms.RichTextBox

Public Event UserScroll()

Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
    If m.Msg = &H115 Then
        RaiseEvent UserScroll()
    End If

    MyBase.WndProc(m)
End Sub
End Class

（xtremedotnettalk.com论坛上的divil代码。）

Answer 2

查看SharpDevelop C＃编译器/ IDE源代码。他们有一个复杂的文本框与行号。您可以查看源代码，找出它们正在做什么，然后自己实现它。

以下是我所引用的示例： alt text http://community.sharpdevelop.net/photos/mattward/images/original/FeatureTourQuickClassBrowser.aspx

Answer 3

http://www.xtremedotnettalk.com/showthread.php?s=&threadid=49661&highlight=RichTextBox有一个代码可用的项目。

您可以使用user / pass登录网站下载zip文件：bugmenot / bugmenot

Answer 4

CodePlex for .net中有一个源代码编辑组件， http://www.codeplex.com/ScintillaNET

Answer 5

这是执行此操作的一些C＃代码。它基于Wayne引用的xtremedotnettalk.com的代码。我做了一些更改，使它实际显示编辑器文本，原来没有。但是，公平地说，原始代码作者确实提到它需要工作。

这是代码（NumberedTextBox.cs）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

namespace NumberedTextBoxLib {
  public partial class NumberedTextBox : UserControl {
    private int lineIndex = 0;

    new public String Text {
      get {
        return editBox.Text;
      }
      set {
        editBox.Text = value;
      }
    }

    public NumberedTextBox() {
      InitializeComponent();
      SetStyle(ControlStyles.UserPaint, true);
      SetStyle(ControlStyles.AllPaintingInWmPaint, true);
      SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
      SetStyle(ControlStyles.ResizeRedraw, true);
      editBox.SelectionChanged += new EventHandler(selectionChanged);
      editBox.VScroll += new EventHandler(OnVScroll);
    }

    private void selectionChanged(object sender, EventArgs args) {
      FindLine();
      Invalidate();
    }

    private void FindLine() {
      int charIndex = editBox.GetCharIndexFromPosition(new Point(0, 0));
      lineIndex = editBox.GetLineFromCharIndex(charIndex);
    }

    private void DrawLines(Graphics g) {
      int counter, y;
      g.Clear(BackColor);
      counter = lineIndex + 1;
      y = 2;
      int max = 0;
      while (y < ClientRectangle.Height - 15) {
        SizeF size = g.MeasureString(counter.ToString(), Font);
        g.DrawString(counter.ToString(), Font, new SolidBrush(ForeColor), new Point(3, y));
        counter++;
        y += (int)size.Height;
        if (max < size.Width) {
          max = (int) size.Width;
        }
      }
      max += 6;
      editBox.Location = new Point(max, 0);
      editBox.Size = new Size(ClientRectangle.Width - max, ClientRectangle.Height);
    }

    protected override void OnPaint(PaintEventArgs e) {
      DrawLines(e.Graphics);
      e.Graphics.TranslateTransform(50, 0);
      editBox.Invalidate();
      base.OnPaint(e);
    }

    ///Redraw the numbers when the editor is scrolled vertically
    private void OnVScroll(object sender, EventArgs e) {
      FindLine();
      Invalidate();
    }

  }
}

这是Visual Studio设计器代码（NumberedTextBox.Designer.cs）

namespace NumberedTextBoxLib {
  partial class NumberedTextBox {
    /// Required designer variable.
    private System.ComponentModel.IContainer components = null;

    /// Clean up any resources being used.
    protected override void Dispose(bool disposing) {
      if (disposing && (components != null)) {
        components.Dispose();
      }
      base.Dispose(disposing);
    }

    /// Required method for Designer support - do not modify 
    /// the contents of this method with the code editor.
    private void InitializeComponent() {
      this.editBox = new System.Windows.Forms.RichTextBox();
      this.SuspendLayout();
      // 
      // editBox
      // 
      this.editBox.AcceptsTab = true;
      this.editBox.Anchor = ((System.Windows.Forms.AnchorStyles) ((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                  | System.Windows.Forms.AnchorStyles.Left)
                  | System.Windows.Forms.AnchorStyles.Right)));
      this.editBox.Location = new System.Drawing.Point(27, 3);
      this.editBox.Name = "editBox";
      this.editBox.Size = new System.Drawing.Size(122, 117);
      this.editBox.TabIndex = 0;
      this.editBox.Text = "";
      this.editBox.WordWrap = false;
      // 
      // NumberedTextBox
      // 
      this.Controls.Add(this.editBox);
      this.Name = "NumberedTextBox";
      this.Size = new System.Drawing.Size(152, 123);
      this.ResumeLayout(false);

    }

    private System.Windows.Forms.RichTextBox editBox;
  }
}

Answer 6

我想这取决于字体大小，我使用“Courier New，9pt，style = bold”

• 添加了平滑滚动的修复程序（不是逐行）
• 当滚动值超过16位时，添加了对大文件的修复。

<强> NumberedTextBox.cs

public partial class NumberedTextBox : UserControl
{
    private int _lines = 0;

    [Browsable(true), 
        EditorAttribute("System.ComponentModel.Design.MultilineStringEditor, System.Design","System.Drawing.Design.UITypeEditor")]
    new public String Text
    {
        get
        {
            return editBox.Text;
        }
        set
        {
            editBox.Text = value;
            Invalidate();
        }
    }

    private Color _lineNumberColor = Color.LightSeaGreen;

    [Browsable(true), DefaultValue(typeof(Color), "LightSeaGreen")]
    public Color LineNumberColor {
        get{
            return _lineNumberColor;
        }
        set
        {
            _lineNumberColor = value;
            Invalidate();
        }
    }

    public NumberedTextBox()
    {
        InitializeComponent();

        SetStyle(ControlStyles.UserPaint, true);
        SetStyle(ControlStyles.AllPaintingInWmPaint, true);
        SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
        SetStyle(ControlStyles.ResizeRedraw, true);
        editBox.SelectionChanged += new EventHandler(selectionChanged);
        editBox.VScroll += new EventHandler(OnVScroll);
    }

    private void selectionChanged(object sender, EventArgs args)
    {
        Invalidate();
    }

    private void DrawLines(Graphics g)
    {
        g.Clear(BackColor);
        int y = - editBox.ScrollPos.Y;
        for (var i = 1; i < _lines + 1; i++)
        {
            var size = g.MeasureString(i.ToString(), Font);
            g.DrawString(i.ToString(), Font, new SolidBrush(LineNumberColor), new Point(3, y));
            y += Font.Height + 2;
        }
        var max = (int)g.MeasureString((_lines + 1).ToString(), Font).Width + 6;
        editBox.Location = new Point(max, 0);
        editBox.Size = new Size(ClientRectangle.Width - max, ClientRectangle.Height);
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        _lines = editBox.Lines.Count();
        DrawLines(e.Graphics);
        e.Graphics.TranslateTransform(50, 0);
        editBox.Invalidate();
        base.OnPaint(e);
    }

    private void OnVScroll(object sender, EventArgs e)
    {
        Invalidate();
    }

    public void Select(int start, int length)
    {
        editBox.Select(start, length);
    }

    public void ScrollToCaret()
    {
        editBox.ScrollToCaret();
    }

    private void editBox_TextChanged(object sender, EventArgs e)
    {
        Invalidate();
    }
}

public class RichTextBoxEx : System.Windows.Forms.RichTextBox
{
    private double _Yfactor = 1.0d;

    [DllImport("user32.dll")]
    static extern IntPtr SendMessage(IntPtr hWnd, Int32 wMsg, Int32 wParam, ref Point lParam);

    private enum WindowsMessages
    {
        WM_USER = 0x400,
        EM_GETSCROLLPOS = WM_USER + 221,
        EM_SETSCROLLPOS = WM_USER + 222
    }

    public Point ScrollPos
    {
        get
        {
            var scrollPoint = new Point();
            SendMessage(this.Handle, (int)WindowsMessages.EM_GETSCROLLPOS, 0, ref scrollPoint);
            return scrollPoint;
        }
        set
        {
            var original = value;
            if (original.Y < 0)
                original.Y = 0;
            if (original.X < 0)
                original.X = 0;

            var factored = value;
            factored.Y = (int)((double)original.Y * _Yfactor);

            var result = value;

            SendMessage(this.Handle, (int)WindowsMessages.EM_SETSCROLLPOS, 0, ref factored);
            SendMessage(this.Handle, (int)WindowsMessages.EM_GETSCROLLPOS, 0, ref result);

            var loopcount = 0;
            var maxloop = 100;
            while (result.Y != original.Y)
            {
                // Adjust the input.
                if (result.Y > original.Y)
                    factored.Y -= (result.Y - original.Y) / 2 - 1;
                else if (result.Y < original.Y)
                    factored.Y += (original.Y - result.Y) / 2 + 1;

                // test the new input.
                SendMessage(this.Handle, (int)WindowsMessages.EM_SETSCROLLPOS, 0, ref factored);
                SendMessage(this.Handle, (int)WindowsMessages.EM_GETSCROLLPOS, 0, ref result);

                // save new factor, test for exit.
                loopcount++;
                if (loopcount >= maxloop || result.Y == original.Y)
                {
                    _Yfactor = (double)factored.Y / (double)original.Y;
                    break;
                }
            }
        }
    }
}

<强> NumberedTextBox.Designer.cs

partial class NumberedTextBox
{
    /// <summary> 
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary> 
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Component Designer generated code

    /// <summary> 
    /// Required method for Designer support - do not modify 
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.editBox = new WebTools.Controls.RichTextBoxEx();
        this.SuspendLayout();
        // 
        // editBox
        // 
        this.editBox.AcceptsTab = true;
        this.editBox.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left) 
        | System.Windows.Forms.AnchorStyles.Right)));
        this.editBox.BorderStyle = System.Windows.Forms.BorderStyle.None;
        this.editBox.Location = new System.Drawing.Point(27, 3);
        this.editBox.Name = "editBox";
        this.editBox.ScrollPos = new System.Drawing.Point(0, 0);
        this.editBox.Size = new System.Drawing.Size(120, 115);
        this.editBox.TabIndex = 0;
        this.editBox.Text = "";
        this.editBox.WordWrap = false;
        this.editBox.TextChanged += new System.EventHandler(this.editBox_TextChanged);
        // 
        // NumberedTextBox
        // 
        this.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
        this.Controls.Add(this.editBox);
        this.Name = "NumberedTextBox";
        this.Size = new System.Drawing.Size(150, 121);
        this.ResumeLayout(false);

    }

    private RichTextBoxEx editBox;

    #endregion
}