【(转)c#中WinForm的TextBox循环自动滚动】本文转自：http://blog.163.com/huang_ying_lu/blog/static/2699983200842075754508/
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
{
///
/// 演示如何在TextBox中让文字循环滚动:
///
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.textBox1.Clear();
for (int i = 0;
i <= 20;
i++ )
{
this.textBox1.Text += string.Format("{0}:jinjazz__{1} ", i,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=GetScrollPos(this.textBox1.Handle,1);
//向下滚动一行
SendMessage(this.textBox1.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
if (i == GetScrollPos(this.textBox1.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
this.textBox1.SelectionStart = 0;
this.textBox1.SelectionLength = 1;
this.textBox1.ScrollToCaret();
this.textBox1.SelectionLength = 0;
}
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();
}
}
}
推荐阅读
- c#用法技巧|c# winform 通过编程取消事件(event)的注册
- winform|C# winform progressbar +label显示进度
- WinForm控制progressBar 进度的一个简单方法
- winform|C#简单使用winform进度条实例
- winform|分享一组好看的 winform 开关按钮
- Win|FindWindow, FindWindowEx, SendMessage, SetForegroundWindow 使用