请高手能给出 用委托 事件 异步 多线程 等方法写的一些程序 最好有注释 请高手能给出 用委托 事件 异步 多线程 等方法写的一些程序 最好有注释 我对这些方法始终不太理解 自己在实际的项目中又不知道如何使用 很郁闷 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 根据这几个关键词,到msdn里查,一个一个的看。 ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpguide/html/cpconcreatingthreads.htm 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 {#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 ); } #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。 //更正上面的注视一下,异步委托部分当时没看明白。注视了。但没用到,这里都是线程。异步的你看看msdn。 一个相当不错的例子,是大师写的。一个C#睡前故事http://dev.csdn.net/article/82644.shtm .NET中默认的dll引用放在哪里? 关于引入动态链接库的问题 超级难题:从编译运行的角度来解释继承,多态 100分@!!!!!!! ADO.NET Entity Framework 的性能问题? c#程序怎么生成exe文件 关于类型转换的问题。有点急。在线等。谢谢 c#中修改tapcontrol的ItemSize属性 如何得到一个系统服务的运行状态?? 急! 组件更新时出错! c#连接上了数据库,数据库也有用户名,可就是登不上去 c#是否适合于做网络游戏的引擎? 怎样将short[]数组转换成byte[]数组
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
{
#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 );
} #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。
一个C#睡前故事
http://dev.csdn.net/article/82644.shtm