c#中WinForm的TextBox循环自动滚动示例
这个问题来自论坛提问，演示代码如下
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsApplication27
.
..{
/**//// <summary>
/// 演示如何在TextBox中让文字循环滚动:
/// 作者jinjazz
/// 作者blog:blog.csdn/jinjazz
/// </summary>
public partial class Form1 : Form
...{
public Form1()
...{
InitializeComponent();
for (int i = 0; i <= 20;i++ )
...{
}
this.timer1.Interval = 200;
this.timer1.Start();
}
//发送消息
[DllImport("user32.dll", EntryPoint = "SendMessage")]
public static extern int SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam);
/
/获取滚动条位置
[DllImport("user32")]
public static extern int GetScrollPos(IntPtr hwnd, int nBar);
//设置滚动条位置
[DllImport("user32.dll")]
static extern int SetScrollPos(IntPtr hWnd, int nBar,
int nPos, bool bRedraw);
public const int EM_LINESCROLL = 0xb6;
private void timer1_Tick(object sender, EventArgs e)
...{
int i= Box1.Handle,1);
/
/向下滚动一行
Box1.Handle, EM_LINESCROLL, 0, 1);//0，1代表垂直滚动条向下滚动
//判断是否有位置变化，如果没有则说明到了底部，返回开始处
如何设置滚动条的位置if (i == Box1.Handle, 1))
...{
//回到顶部，这里用SetScrollPos似乎有问题，滚动条和文字不是同步更新
}
Console.WriteLine(i);
}
private void textBox1_MouseEnter(object sender, EventArgs e)
...{
this.timer1.Stop();
}
private void textBox1_MouseLeave(object sender, EventArgs e)
...{
this.timer1.Start();
}
}
}