在C#中同步多行文本框位置

我有一个C#应用程序,其中有两个并排的多行文本框,每个文本框位于拆分容器的一侧.我想同步它们的垂直滚动,这样当用户向上或向下滚动其中一个文本框时,另一个文本框分别在同一方向滚动.有没有办法做到这一点？谢谢.

其他信息 – 7/26/10

我在MSDN网站上找到了一些有趣的API：

TextBox.GetFirstVisibleLineIndex Method
TextBox.GetLastVisibleLineIndex Method
TextBox.ScrollToLine Method

那里的文档看起来很有希望,但是当我尝试使用它时,我的编译器(Microsoft Visual C#2008 Express Edition)就会抱怨,即使在将PresenationFramework作为引用添加并使用System.Windows.Controls插入之后也是如此;在文件的顶部：

Error 1 ‘System.Windows.Forms.TextBox’ does not contain a deFinition for ‘GetFirstVisibleLineIndex’ and no extension method ‘GetFirstVisibleLineIndex’ accepting a first argument of type ‘System.Windows.Forms.TextBox’ Could be found (are you missing a using directive or an assembly reference?)

其他信息 – 7/27/10

我正在努力实现Jay的实现新控件的建议,但是我无法将eventhandler绑定到控件中.这是我到目前为止所拥有的：

public partial class MyFormApplication : Form
{
  public MyFormApplication() // MyFormApplication constructor
  {
     this.InitializeComponent();

     this.textBox1.dispose(); // Replacing with textBoxSync1
     this.textBox2.dispose(); // Replacing with textBoxSync2

     // Draw textBoxSync1
     this.textBoxSync1.AcceptsReturn = true;
     this.textBoxSync1.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.textBoxSync1.BackColor = System.Drawing.SystemColors.Control;
     this.textBoxSync1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
     this.textBoxSync1.Font = new System.Drawing.Font("Courier New",8.25F,System.Drawing.FontStyle.Regular,system.drawing.graphicsUnit.Point,((byte)(0)));
     this.textBoxSync1.Location = new System.Drawing.Point(0,19);
     this.textBoxSync1.Multiline = true;
     this.textBoxSync1.Name = "textBoxSync1";
     this.textBoxSync1.ReadOnly = true;
     this.textBoxSync1.ScrollBars = System.Windows.Forms.ScrollBars.Both;
     this.textBoxSync1.Size = new System.Drawing.Size(338,231);
     this.textBoxSync1.TabIndex = 0;
     this.textBoxSync1.TabStop = false;
     this.textBoxSync1.WordWrap = false;
     this.splitContainer1.Panel1.Controls.Remove(this.textBox1);
     this.splitContainer1.Panel1.Controls.Add(this.textBoxSync1);

     // Draw textBoxSync2
     this.textBoxSync2.AcceptsReturn = true;
     this.textBoxSync2.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.textBoxSync2.BackColor = System.Drawing.SystemColors.Control;
     this.textBoxSync2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
     this.textBoxSync2.Font = new System.Drawing.Font("Courier New",((byte)(0)));
     this.textBoxSync2.Location = new System.Drawing.Point(0,19);
     this.textBoxSync2.Multiline = true;
     this.textBoxSync2.Name = "textBoxSync2";
     this.textBoxSync2.ReadOnly = true;
     this.textBoxSync2.ScrollBars = System.Windows.Forms.ScrollBars.Both;
     this.textBoxSync2.Size = new System.Drawing.Size(113,231);
     this.textBoxSync2.TabIndex = 30;
     this.textBoxSync2.TabStop = false;
     this.textBoxSync2.WordWrap = false;
     this.splitContainer1.Panel2.Controls.Remove(this.textBox2);
     this.splitContainer1.Panel2.Controls.Add(this.textBoxSync2);

     /* Goes on to perform other initializations... */

  }

  private void textBoxSync1_VerticalScroll(Message msg)
  {
     msg.HWnd = this.textBoxSync2.Handle;
     this.textBoxSync2.PubWndProc(ref msg);
  }

  private void textBoxSync2_VerticalScroll(Message msg)
  {
     msg.HWnd = this.textBoxSync1.Handle;
     this.textBoxSync1.PubWndProc(ref msg);
  }
}

public class TextBoxSynchronizedScroll : System.Windows.Forms.TextBox
{
  public event vScrollEventHandler VerticalScroll;
  public delegate void vScrollEventHandler(System.Windows.Forms.Message message);

  public const int WM_VSCROLL = 0x115;

  protected override void WndProc(ref System.Windows.Forms.Message msg)
  {
     if (msg.Msg == WM_VSCROLL)
     {
        if (VerticalScroll != null)
        {
           VerticalScroll(msg);
        }
     }

     base.WndProc(ref msg);
  }

  public void PubWndProc(ref System.Windows.Forms.Message msg)
  {
     base.WndProc(ref msg);
  }
}

我应该认为……

this.textBoxSync1.VerticalScroll += new System.EventHandler(this.textBoxSync1_VerticalScroll);

…需要将垂直滚动事件挂钩到控件中,但正如您可能看到的,这不起作用.任何建议,将不胜感激.谢谢.

解决方法

我 subclassed a RichTextBox并听取了WM_VSCROLL消息来做你想做的事情.也许你可以这样做,而不是使用TextBox.

回复您的编辑：

注意：我假设您在复制并粘贴到应用程序表单中时出现了一个小错误,而且textBoxSyncBusTraffic == textBoxSync1

问题出在你的控件的VerticalScroll事件声明中,在这一行：

this.textBoxSyncBusTraffic.VerticalScroll += new System.EventHandler(this.textBoxSyncBusTraffic_VerticalScroll);

>您的自定义控件需要订阅控件的TextBoxSynchronizedScroll.vScrollEventHandler事件(而不是System.EventHandler).
>事件处理程序中引用的方法不存在(至少不在您发布的代码中).

所以改变这个：

this.textBoxSyncBusTraffic.VerticalScroll += new System.EventHandler(this.textBoxSyncBusTraffic_VerticalScroll);

对此：

this.textBoxSync1.VerticalScroll += new TextBoxSynchronizedScroll.vScrollEventHandler(textBoxSync1_VerticalScroll);

这使用正确的事件处理程序并引用您需要和已有的方法.

另外,请确保textBoxSync2的VerticalScroll事件的声明如下所示：

this.textBoxSync2.VerticalScroll += new TextBoxSynchronizedScroll.vScrollEventHandler(textBoxSync2_VerticalScroll);

顺便提一下,您可以使用几种技术来更轻松地声明事件：

首先是使用表单设计器.如果在窗体设计器中的扩展控件实例的“属性”窗口中打开“事件”窗口,则会看到名为VerticalScroll的事件.双击此项以使Visual Studio声明事件并创建一个在事件触发时调用的方法.

在代码中设置事件时,还可以使用快捷方式.键入以下代码后,您会发现：

youtextBoxSync1.VerticalScroll +=

系统将提示您按Tab键完成声明.如果这样做,Visual Studio将创建一个具有正确签名的方法.

原文地址：https://www.jb51.cc/csharp/243342.html

在C#中同步多行文本框位置

解决方法

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