C#MessageBox 自动关闭窗口

1：MessageBox弹出的模式窗口会先阻塞掉它的父级线程.所以我们可以考虑在MessageBox前先增加一个用于"杀"掉MessageBox窗口的线程.因为需要在规定时间内"杀"掉窗口

解决：可以考虑在MessageBox前先增加一个用于"杀"掉MessageBox窗口的线程.因为需要在规定时间内"杀"掉窗口,所以我们可以直接考虑使用Timer类.

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 LeafSoft.Units
{
    class KillMessageBox
    {
          [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
          private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);
          [DllImport("user32.dll", CharSet = CharSet.Auto)]
          public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
          public const int WM_CLOSE = 0x10;
          public KillMessageBox()
          {
          }
          public string caption="错误";
          public void StartKiller()
          {
           Timer timer = new Timer();
           timer.Interval = 6000; //3秒启动
           timer.Tick += new EventHandler(Timer_Tick);
           timer.Start();
          }
          private void Timer_Tick(object sender, EventArgs e)
          {
              KillBoxMethod();
           //停止Timer
           ((Timer)sender).Stop();
          }
          public void KillBoxMethod()
          {
           //按照MessageBox的标题，找到MessageBox的窗口
           IntPtr ptr = FindWindow(null, caption);
           if (ptr != IntPtr.Zero)
           {
            //找到则关闭MessageBox窗口
            PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
           }
          }
    }
}

2：每次在使用MessageBox.Show()之前先用创建KillMessageBox对象实例

            KillMessageBox killbox = new KillMessageBox();
            killbox.caption = "异常";//caption变量为窗口的标题  可以设置默认值
            killbox.StartKiller();
            MessageBox.Show("你好", "异常");