自写的BackgroundWorker的学习例子
按照惯例先上个图，自己照着人家的例子写了一遍，基本上把这个弄懂了，这个控件就是省事，不懂线程原理的人也可使，ms就是厉害，生产力节节提高哈，
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Threading;
9 using System.Windows.Forms;
10
11 namespace BrowserDemo
12 {
13 public partial class Form7 : Form
14 {
15 const int argument = 20000 ;
16
17 public Form7()
18 {
19 InitializeComponent();
20 }
21
22 private void backgroundWorker1_DoWork( object sender, DoWorkEventArgs e)
23 {
24 for (var i = 0 ;i < int .Parse(e.Argument.ToString());i ++ )
25 {
26 e.Result = i;
27 (sender as BackgroundWorker).ReportProgress(( int )((( double )i / ( double )(( int )e.Argument)) * 100 ),i);
28 Thread.Sleep( 20 );
29 if ( this .backgroundWorker1.CancellationPending)
30 return ;
31 }
32 }
33
34 private void backgroundWorker1_ProgressChanged( object sender, ProgressChangedEventArgs e)
35 {
36 this .listBox1.Items.Add(e.UserState);
37 this .progressBar1.Value = e.ProgressPercentage;
38 }
39
40 private void backgroundWorker1_RunWorkerCompleted( object sender, RunWorkerCompletedEventArgs e)
41 {
42 MessageBox.Show( " finished " );
43 }
44
45 private void button1_Click( object sender, EventArgs e)
46 {
47 if ( this .backgroundWorker1.IsBusy)
48 {
49 MessageBox.Show( " 慢则那，等着吧 " );
50 return ;
51 }
52 this .backgroundWorker1.RunWorkerAsync(argument);
53 this .button2.Enabled = true ;
54 this .button3.Enabled = true ;
55
56 }
57
58 private void button2_Click( object sender, EventArgs e)
59 {
60 MessageBox.Show( " 111 " );
61 }
62
63 private void button3_Click( object sender, EventArgs e)
64 {
65 this .backgroundWorker1.CancelAsync();
66 }
67
68 private void Form7_Load( object sender, EventArgs e)
69 {
70 this .button2.Enabled = false ;
71 this .button3.Enabled = false ;
72 }
73 }
74 }
75
完整的工程如下
https://files.cnblogs.com/lexus/BrowserDemo.7z
相关资源，发现msdn上写得比较还好，不过自己写一遍自己就清楚了，我发现网上的msdn,是不是和vs2008里的光盘里的那个msdn不一样，有些资源为什么在光盘上的找不到呢，等我采集程序做好了，我要把它都抓下来，占为已有，嘿嘿
http://msdn.microsoft.com/zh-cn/library/ms233672(VS.80).aspx
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