winform 关于Messagebox自动定时关闭

using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.InteropServices;

using System.Text;

using System.Windows.Forms;



namespace WindowsFormsApplication2

{

    public class MessageBoxTimeOut

    {

        private string _caption;



        public void Show(string text, string caption)

        {

            Show(3000, text, caption);

        }

        public void Show(int timeout, string text, string caption)

        {

            Show(timeout, text, caption, MessageBoxButtons.OK, MessageBoxIcon.Information);

        }

        public void Show(int timeout, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)

        {

            this._caption = caption;

            StartTimer(timeout);

            MessageBox.Show(text, caption, buttons, icon);

        }

        private void StartTimer(int interval)

        {

            Timer timer = new Timer();

            timer.Interval = interval;

            timer.Tick += new EventHandler(Timer_Tick);

            timer.Enabled = true;

        }

        private void Timer_Tick(object sender, EventArgs e)

        {

            KillMessageBox();

            //停止计时器

            ((Timer)sender).Enabled = false;

        }

        [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;

        private void KillMessageBox()

        {

            //查找MessageBox的弹出窗口,注意对应标题

            IntPtr ptr = FindWindow(null, this._caption);

            if (ptr != IntPtr.Zero)

            {

                //查找到窗口则关闭

                PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);

            }

        }

    }

}

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调用：

 MessageBoxTimeOut mb = new MessageBoxTimeOut();

 mb.Show("产品编码不存在!", "提示(窗体3秒后自动关闭...)");

View Code