C# -- 文件的压缩与解压（GZipStream）

文件的压缩与解压

需引入 System.IO.Compression;

1.C#代码（入门案例）

 1             Console.WriteLine("压缩文件...............");
 2             using (FileStream fr = File.OpenRead("d:\\test.txt"))
 3             {
 4                 using (FileStream fw = File.OpenWrite("d:\\test.zip"))
 5                 {
 6                     using (GZipStream gz = new GZipStream(fw, CompressionMode.Compress))
 7                     {
 8 
 9                         byte[] by = new byte[1024 * 1024];
10                         int r = fr.Read(by, 0, by.Length);
11                         while (r > 0)
12                         {
13                             gz.Write(by, 0, r);
14                             r = fr.Read(by, 0, r);
15                         }
16                     }
17                 }
18             }
19             Console.WriteLine("压缩完成。");
20 
21 
22             Console.WriteLine("解压文件...............");
23             using (FileStream fr = File.OpenRead("d:\\test.zip"))
24             {
25                 using (GZipStream gz = new GZipStream(fr, CompressionMode.Decompress))
26                 {
27                     using (FileStream fw = File.OpenWrite("d:\\test2.txt"))
28                     {
29 
30                         byte[] by = new byte[1024 * 1024];
31                         int r = gz.Read(by, 0, by.Length);
32                         while (r > 0)
33                         {
34                             fw.Write(by, 0, r);
35                             r = gz.Read(by, 0, r);
36                         }
37                     }
38                 }
39             }
40             Console.WriteLine("解压完成。");
41 
42             Console.ReadKey();