c# 关闭messageBox

[转载]

我们都知道,MessageBox弹出的窗口是模式窗口,模式窗口会自动阻塞父线程的.所以如果有以下代码:

MessageBox.Show("内容',"标题");
....其它代码...

    则只有关闭了MessageBox的窗口后才会运行下面的代码.而在某些场合下,我们又需要在一定时间内如果在用户还没有关闭窗口时能自动关闭掉窗口而避免程序一直停留不前..这样的话我们怎么做呢?上面也说了,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,所以我们可以直接考虑使用Timer类.以下是实现代码:

 

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace MyTest
...{
    /** <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    ...{
        private System.Windows.Forms.Button button1;
        /** <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        ...{
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }

        /** <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        ...{
            if( disposing )
            ...{
                if (components != null)
                ...{
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
        /** <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        ...{
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            //
            // button1
            //
            this.button1.Location = new System.Drawing.Point(176, 48);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(96, 24);
            this.button1.TabIndex = 0;
            this.button1.Text = "button1";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            //
            // Form1
            //
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.Add(this.button1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);

        }
        #endregion

        /** <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        ...{
            Application.Run(new Form1());
        }

        private void button1_Click(object sender, System.EventArgs e)
        ...{
            StartKiller();
            MessageBox.Show("这里是MessageBox弹出的内容","MessageBox");
            MessageBox.Show("这里是跟随运行的窗口","窗口");
        }

        private void StartKiller()
        ...{
            Timer timer = new Timer();
            timer.Interval = 10000;    //10秒启动
            timer.Tick += new EventHandler(Timer_Tick);
            timer.Start();
        }

        private void Timer_Tick(object sender, EventArgs e)
        ...{
            KillMessageBox();
            //停止计时器
            ((Timer)sender).Stop();
        }

        private void KillMessageBox()
        ...{
            //查找MessageBox的弹出窗口,注意对应标题
            IntPtr ptr = FindWindow(null,"MessageBox");
            if(ptr != IntPtr.Zero)
            ...{
                //查找到窗口则关闭
                PostMessage(ptr,WM_CLOSE,IntPtr.Zero,IntPtr.Zero);
            }
        }

        [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;
    }