using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;
using?System.Threading;
////?該例子在?Backgroundworker?組件的輔助線程上隨機產生整數，輔助線程運行DoWork事件處理程序，//
////當產生能被5整除的整數時，使用ProgressChanged事件把整數顯示到窗體上。//
////程序執行到?RunWorkerAsync?方法時，將啟動后臺線程。?在Dowork事件中，
//如果應用程序沒有取消后臺操作，將不停的產生隨機整數，然后判斷該整數能否被5整除，
//如果能被5整除，執行work.ReportProgress方法來觸發?ProgressChanged?事件，
//在?ProgressChanged?事件中與界面長須打交道，把生產的隨機整數顯示到窗體上。//
namespace?backgroundworker3
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}
????????private?bool?isSuspend;//是否需要暫停操作

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{
????????????backgroundWorker1.WorkerReportsProgress?=?true;//聲明可以報告進度
????????????backgroundWorker1.WorkerSupportsCancellation?=?true;//可以異步取消
????????????progressBar1.Minimum?=?0;
????????????progressBar1.Maximum?=?100;
????????????progressBar1.Step?=?10;
????????}
????????///?模擬一個耗時的方法（讓線程休眠0.1秒）
????????private?void?GetData（）
????????{
????????????System.Threading.Thread.Sleep（100）;
????????}

????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????bool?aa?=?backgroundWorker1.IsBusy;
????????????label1.Text?=?aa.ToString（）;
????????????if?（!backgroundWorker1.IsBusy）?//如果dowork處于不忙狀態，可以執行操作
????????????{
????????????????backgroundWorker1.RunWorkerAsync（）;
????????????}
????????????
????????}
????????///?backgroundWorker的核心事件1，執行耗時的操作就在個方法里執行
?????????//下面的內容相當于線程要處理的內容。//注意：不要在此事件中和界面控件打交道

????????//不要直接使用組件實例名稱（backgroundWorker1）因為有多個BackgroundWorker時，???
????????//直接使用會產生耦合問題，應該通過下面的轉換使用它??
????????private?void?backgroundWorker1_DoWork（object?sender?DoWorkEventArgs?e）
????????{
????????????
???????????
????????????
????????????
??????????BackgroundWorker?worker?=?sender?as?BackgroundWorker;??
????????????
??????????Random?r?=?new?Random（）;??
???????????int?numCount?=?0;????????????
????????????while?（worker.CancellationPending?==?false&&numCount<10）???????????
????????????{??
????????????????int?num?=?r.Next（0?100）;??
????????????????if?（num?%?5?==?0）??
???????????????{??
???????????????????numCount++;
?????????????????
???????????????????worker.ReportProgress（numCount?num）;?
????????????????
????????????????????Thread.Sleep（1000）;??
???????????????}
????????????????while?（isSuspend）
????????????????{
????????????????????Thread.Sleep（50）;
????????????????}
????????????}??
????????????e.Result?=?numCount;??

????????}
????????///?backgroundWorker的核心事件2，用于接收DoWork方法執行過程中的情況

????????private?void?backgroundWorker1_ProgressChanged（object?sender?ProgressChangedEventArgs?e）
????????{
????????????////接收DoWork傳送過來的數據并在界面上顯示
????????????
??????????
????????????if?（e.UserState.ToString（）?!=?““）
????????????{
????????????????progressBar1.Value?=?e.ProgressP

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3780??2013-03-26?13:28??backgroundworker3\backgroundworker3\backgroundworker3.csproj

?????文件??????11264??2013-03-26?14:45??backgroundworker3\backgroundworker3\bin\Debug\backgroundworker3.exe

?????文件??????28160??2013-03-26?14:45??backgroundworker3\backgroundworker3\bin\Debug\backgroundworker3.pdb

?????文件??????14328??2013-03-26?15:15??backgroundworker3\backgroundworker3\bin\Debug\backgroundworker3.vshost.exe

?????文件????????490??2007-07-21?01:33??backgroundworker3\backgroundworker3\bin\Debug\backgroundworker3.vshost.exe.manifest

?????文件???????5265??2013-03-26?14:45??backgroundworker3\backgroundworker3\Form1.cs

?????文件???????6195??2013-03-26?14:44??backgroundworker3\backgroundworker3\Form1.Designer.cs

?????文件???????6019??2013-03-26?14:44??backgroundworker3\backgroundworker3\Form1.resx

?????文件????????978??2013-03-26?15:15??backgroundworker3\backgroundworker3\obj\Debug\backgroundworker3.csproj.FileListAbsolute.txt

?????文件????????847??2013-03-26?14:44??backgroundworker3\backgroundworker3\obj\Debug\backgroundworker3.csproj.GenerateResource.Cache

?????文件??????11264??2013-03-26?14:45??backgroundworker3\backgroundworker3\obj\Debug\backgroundworker3.exe

?????文件????????180??2013-03-26?14:44??backgroundworker3\backgroundworker3\obj\Debug\backgroundworker3.Form1.resources

?????文件??????28160??2013-03-26?14:45??backgroundworker3\backgroundworker3\obj\Debug\backgroundworker3.pdb

?????文件????????180??2013-03-26?13:56??backgroundworker3\backgroundworker3\obj\Debug\backgroundworker3.Properties.Resources.resources

?????文件????????498??2013-03-26?13:17??backgroundworker3\backgroundworker3\Program.cs

?????文件???????1390??2013-03-26?13:17??backgroundworker3\backgroundworker3\Properties\AssemblyInfo.cs

?????文件???????2884??2013-03-26?13:17??backgroundworker3\backgroundworker3\Properties\Resources.Designer.cs

?????文件???????5612??2013-03-26?13:17??backgroundworker3\backgroundworker3\Properties\Resources.resx

?????文件???????1102??2013-03-26?13:17??backgroundworker3\backgroundworker3\Properties\Settings.Designer.cs

?????文件????????249??2013-03-26?13:17??backgroundworker3\backgroundworker3\Properties\Settings.settings

?????文件????????941??2013-03-26?13:17??backgroundworker3\backgroundworker3.sln

????..A..H.?????19456??2013-03-26?14:47??backgroundworker3\backgroundworker3.suo

?????目錄??????????0??2013-03-26?13:17??backgroundworker3\backgroundworker3\obj\Debug\TempPE

?????目錄??????????0??2013-03-26?13:56??backgroundworker3\backgroundworker3\bin\Debug

?????目錄??????????0??2013-03-26?14:45??backgroundworker3\backgroundworker3\obj\Debug

?????目錄??????????0??2013-03-26?13:17??backgroundworker3\backgroundworker3\bin

?????目錄??????????0??2013-03-26?13:17??backgroundworker3\backgroundworker3\obj

?????目錄??????????0??2013-03-26?13:17??backgroundworker3\backgroundworker3\Properties

?????目錄??????????0??2013-03-26?14:45??backgroundworker3\backgroundworker3

?????目錄??????????0??2013-03-26?13:17??backgroundworker3

............此處省略3個文件信息