[转载]Asp.net中文件的压缩与解压

 1  /// <summary>
 2         /// 压缩文件
 3         /// </summary>
 4         /// <param name="fileName">要压缩的所有文件（完全路径)</param>
 5         /// <param name="name">压缩后文件路径</param>
 6         /// <param name="Level">压缩级别</param>
 7          public void ZipFileMain(string[] filenames, string name, int Level)
 8         {
 9             ZipOutputStream s = new ZipOutputStream(File.Create(name));
10             Crc32 crc = new Crc32();
11             //压缩级别
12             s.SetLevel(Level); // 0 - store only to 9 - means best compression
13             try
14             {
15                 foreach (string file in filenames)
16                 {
17                     //打开压缩文件
18                     FileStream fs = File.OpenRead(file);
19 
20                     byte[] buffer = new byte[fs.Length];
21                     fs.Read(buffer, 0, buffer.Length);
22                     
23                     //建立压缩实体
24                     ZipEntry entry = new ZipEntry(System.IO.Path.GetFileName(file));
25 
26                     //时间
27                     entry.DateTime = DateTime.Now;
28 
29                     // set Size and the crc, because the information
30                     // about the size and crc should be stored in the header
31                     // if it is not set it is automatically written in the footer.
32                     // (in this case size == crc == -1 in the header)
33                     // Some ZIP programs have problems with zip files that don't store
34                     // the size and crc in the header.
35                     //空间大小
36                     entry.Size = fs.Length;
37                     fs.Close();
38                     crc.Reset();
39                     crc.Update(buffer);
40                     entry.Crc = crc.Value;
41                     s.PutNextEntry(entry);
42                     s.Write(buffer, 0, buffer.Length);
43                 }
44             }
45             catch
46             {
47                 throw;
48             }
49             finally
50             {
51                 s.Finish();
52                 s.Close();
53             }
54 
55         }

 1  /// <summary>
 2         /// 解压文件
 3         /// </summary>
 4         /// <param name="ZipPath">被解压的文件路径</param>
 5         /// <param name="Path">解压后文件的路径</param>
 6         public void UnZip(string ZipPath,string Path)
 7         {
 8             ZipInputStream s = new ZipInputStream(File.OpenRead(ZipPath));
 9 
10             ZipEntry theEntry;
11             try
12             {
13                 while ((theEntry = s.GetNextEntry()) != null)
14                 {
15                     string fileName = System.IO.Path.GetFileName(theEntry.Name);
16 
17                     //生成解压目录
18                     Directory.CreateDirectory(Path);
19 
20                     if (fileName != String.Empty)
21                     {
22                         //解压文件
23                         FileStream streamWriter = File.Create(Path + fileName);
24 
25                         int size = 2048;
26                         byte[] data = new byte[2048];
27                         while (true)
28                         {
29                             size = s.Read(data, 0, data.Length);
30                             if (size > 0)
31                             {
32                                 streamWriter.Write(data, 0, size);
33                             }
34                             else
35                             {
36 
37                                 streamWriter.Close();
38                                 streamWriter.Dispose();
39                                 break;
40                             }
41                         }
42 
43                         streamWriter.Close();
44                         streamWriter.Dispose();
45                     }
46                 }
47             }
48             catch
49             {
50                 throw;
51             }
52             finally
53             {
54                 s.Close();
55                 s.Dispose();
56             }
57         }
58     }