文件读写和进度条

View Code 
 1         private void Form1_Load(object sender, EventArgs e)
 2         {
 3             new Thread(copyFileAndProgressBar).Start();
 4             progressBar1.Value = 0;
 5             timer1.Interval = 2000;
 6             timer1.Start();
 7         }
 8 
 9         private void timer1_Tick(object sender, EventArgs e)
10         {
11             if (endTime - startTime > 0)
12                 progressBar1.Maximum = (int)(endTime - startTime);
13             if (progressBar1.Value == progressBar1.Maximum)
14             {
15                 progressBar1.PerformStep();
16                 timer1.Enabled = false;
17                 timer1.Dispose();
18                 return;
19             }
20             progressBar1.Value += 1;
21         }
22 
23         //定义开始时间
24         long startTime; 
25         //定义结束时间
26         long endTime;
27         //拷贝文件和进度条显示
28         private void copyFileAndProgressBar()
29         {
30             startTime = DateTime.Now.Second;
31             FileStream fsRead = null;
32             BinaryReader br = null;
33             FileStream fsWrite = null;
34             BinaryWriter bw = null;
35             try
36             {
37                 fsRead = new FileStream(@"C:\Users\Administrator\Desktop\Office2007.iso",
38                     FileMode.Open, FileAccess.Read);
39                 int totleSize = (int)fsRead.Length;
40                 byte[] buffer;
41                 br = new BinaryReader(fsRead);
42                 //读取文件
43                 buffer = br.ReadBytes(totleSize);
44                 //如果存在目标文件,则删除
45                 if (File.Exists(@"D:\bak.iso"))
46                     File.Delete(@"D:\bak.iso");
47                 fsWrite = new FileStream(@"D:\bak.iso", FileMode.Create, FileAccess.Write);
48                 bw = new BinaryWriter(fsWrite);
49                 //写入二进制流到指定文件
50                 bw.Write(buffer);
51                 endTime = DateTime.Now.Second;
52             }
53             catch (Exception ex)
54             {
55                 throw new Exception(ex.Message);
56             }
57             finally
58             {
59                 br.Close();
60                 fsRead.Close();
61                 bw.Close();
62                 fsWrite.Close();
63             }
64         }



 

posted @ 2012-03-25 01:29  ghypnus  阅读(334)  评论(0)  编辑  收藏  举报