using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;namespace 异步委托和线程调用...{ /**//// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form ...{默认代码#region 默认代码 private System.Windows.Forms.Button button1; private System.Windows.Forms.Button button2; private System.Windows.Forms.ProgressBar progressBar1; /**//// <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.button2 = new System.Windows.Forms.Button(); this.progressBar1 = new System.Windows.Forms.ProgressBar(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(147, 12); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(116, 28); this.button1.TabIndex = 0; this.button1.Text = "使用线程=>"; this.button1.Click += new System.EventHandler(this.button1_Click); // // button2 // this.button2.Location = new System.Drawing.Point(147, 44); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(116, 28); this.button2.TabIndex = 0; this.button2.Text = "使用异步委托=>"; this.button2.Click += new System.EventHandler(this.button2_Click); // // progressBar1 // this.progressBar1.Location = new System.Drawing.Point(0, 80); this.progressBar1.Maximum = 1000; this.progressBar1.Name = "progressBar1"; this.progressBar1.Size = new System.Drawing.Size(412, 12); this.progressBar1.TabIndex = 1; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(410, 94); this.Controls.Add(this.progressBar1); this.Controls.Add(this.button1); this.Controls.Add(this.button2); this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow; this.Name = "Form1"; this.Text = "Form1"; this.Closed += new System.EventHandler(this.Form1_Closed); this.ResumeLayout(false); } #endregion /**//// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() ...{ Application.Run(new Form1()); }#endregion //线程 private void button1_Click(object sender, System.EventArgs e) ...{ System.Threading.Thread th = new System.Threading.Thread( new System.Threading.ThreadStart(Fun2)); this.processEvent += new myProcessEventHandle(Form1_processEvent); th.Start(); button2.Enabled = false; } //异步委托 private void button2_Click(object sender, System.EventArgs e) ...{ System.Threading.WaitCallback wc = new System.Threading.WaitCallback(Fun); object obj = this.button1;//这里没用。到时候你可以用来传递参数 this.processEvent += new myProcessEventHandle(Form1_processEvent); System.Threading.ThreadPool.QueueUserWorkItem(wc,obj); button1.Enabled = false; } public delegate void myProcessEventHandle(int percent);//定义事件 public event myProcessEventHandle processEvent = null;//事件声明 //线程无法带参数启动,和这个函数通讯直接用成员变量就可以了 private void Fun2() ...{ int i = 0; String str = this.Text; while (i<1000) ...{ i++; //this.Text = i.ToString(); if (this.processEvent != null) ...{ this.processEvent(i); } System.Threading.Thread.Sleep(8); } TelMe(); this.Text = str; } //异步委托可以也必须要一个参数,当然不想用就传一个null就可以了 private void Fun(object obj) ...{ int i = 0; String str = this.Text; while (i<1000) ...{ i++; //this.Text = i.ToString(); if (this.processEvent != null) ...{ this.processEvent(i); } System.Threading.Thread.Sleep(8); } TelMe(); this.Text = str; } //不是回调,但是同一个类里写的,就可以直接调用了。 private void TelMe() ...{ this.processEvent -= new myProcessEventHandle(Form1_processEvent); button1.Enabled = true; button2.Enabled = true; MessageBox.Show("操作完成!"); } //事件方式通知主线程进度 private void Form1_processEvent(int percent) ...{ this.progressBar1.Value = percent; this.Text = ((double)percent/10).ToString() + "%"; } private void Form1_Closed(object sender, System.EventArgs e) ...{ System.Environment.Exit(0);//用于退出没有运行结束的线程 } }}//以上代码在vs2003可以运行。以前写的例子。