1 一、压缩文件
  2 
  3  using System;
  4 using ICSharpCode.SharpZipLib;
  5 using ICSharpCode.SharpZipLib.Checksums;
  6 using System.IO;
  7 using ICSharpCode.SharpZipLib.Zip;
  8 using System.Collections;
  9 
 10 namespace wsUpFiles
 11 {
 12  /// <summary>
 13  /// Common 的摘要说明。
 14  /// </summary>
 15  public class Common
 16  {
 17   public Common()
 18   {
 19    //
 20    // TODO: 在此处添加构造函数逻辑
 21    //
 22   }
 23 
 24   /// <summary>
 25   /// 压缩文件
 26   /// </summary>
 27   /// <param name="sourceFileNames">压缩文件名称集合</param>
 28   /// <param name="destFileName">压缩后文件名称</param>
 29   /// <param name="password">密码</param>
 30   public static void zipFile(string path,string destFileName)
 31   {
 32    Crc32 crc = new Crc32();
 33    ZipOutputStream s = new ZipOutputStream(File.Create(destFileName));
 34    s.Password="";
 35    s.SetLevel(6); // 0 - store only to 9 - means best compression
 36    //定义
 37    System.IO.DirectoryInfo myDir = new DirectoryInfo(path);
 38    if(myDir.Exists == true)
 39    {
 40     System.IO.FileInfo[] myFileAry = myDir.GetFiles();
 41     
 42     //循环提取文件夹下每一个文件,提取信息,
 43     foreach (FileInfo objFiles in myFileAry)
 44     {
 45      FileStream fs = File.OpenRead(objFiles.FullName);
 46      byte[] buffer = new byte[fs.Length];
 47      fs.Read(buffer, 0, buffer.Length);
 48      ZipEntry entry = new ZipEntry(objFiles.FullName);
 49      entry.DateTime = DateTime.Now;
 50      entry.Size = fs.Length;
 51      fs.Close();
 52      crc.Reset();
 53      crc.Update(buffer);
 54      entry.Crc  = crc.Value;
 55      s.PutNextEntry(entry);
 56      s.Write(buffer, 0, buffer.Length);           
 57     }   
 58     s.Finish();
 59     s.Close();
 60    }
 61   }
 62   
 63  }
 64 }
 65 
 66 要对压缩文件加密时，要s.Password = "aaa"; aaa为密码。
 67 
 68 二、解压文件
 69 
 70  /// <summary>
 71   /// 解压文件
 72   /// </summary>
 73   /// <param name="sourceFileName">被解压文件名称</param>
 74   /// <param name="destPath">解压后文件目录</param>
 75   /// <param name="password">密码</param>
 76   public static void unzipFile(string sourceFileName,string destPath,string fileType)
 77   {
 78    ZipInputStream s = new ZipInputStream(File.OpenRead(sourceFileName));
 79    ZipEntry theEntry;
 80    ArrayList al=new ArrayList();
 81 
 82    while ((theEntry = s.GetNextEntry()) != null) 
 83    {   
 84     string fileName=Path.GetFileName(theEntry.Name);
 85     if(fileName!="")
 86     {
 87      fileName=destPath+"\\"+fileName;
 88      if(!Directory.Exists(destPath))
 89      {
 90       Directory.CreateDirectory(destPath);
 91      }
 92      FileStream streamWriter = File.Create(fileName);     
 93      int size = 2048;
 94      byte[] data = new byte[2048];
 95      s.Password="";
 96      while (true) 
 97      {
 98       size = s.Read(data, 0, data.Length);
 99       if (size > 0) 
100       {
101        streamWriter.Write(data, 0, size);
102       } 
103       else 
104       {
105        break;
106       }
107      }
108      streamWriter.Close();
109     }
110 
111    }
112    s.Close();
113    
114   }
115 
116 注意：程序的压缩过的文件，要通过系统上的工具解压出来的路径会相当多，因其在压缩时保留了原来的绝对路径，但压缩的文件中只包含所压缩的目标文件，当用程序解压出来的文件是相对的文件路径。