C#做ZIP压缩软件(讨论)

Question

http://msdn.microsoft.com/zh-cn/library/system.io.compression.gzipstream(VS.80).aspx

Answer 1

//转贴
public static string CompressString(string unCompressedString)
{
   byte[] bytData = System.Text.Encoding.UTF8.GetBytes(unCompressedString);
   MemoryStream ms = new MemoryStream();
   Stream s = null;
   try
   {
     s = new GZipStream(ms, CompressionMode.Compress);
     int totalRead = 0;
     int bufLen = 4096;
     int thisRead = 0;
     while (true)
     {
       if (totalRead < bytData.Length)
       {
         thisRead = bytData.Length - totalRead;
         if (thisRead > bufLen)
           thisRead = bufLen;
         s.Write(bytData, totalRead, thisRead);
         totalRead = totalRead + thisRead;
       }
       else
         break;
    }                
  }
  catch (Exception e)
  {
    LogUtil.LogError("Compress String Error:" + e.Message);
  }
  finally
  {
    if (s != null)
    {                    
       s.Close();
       s.Dispose();
       s = null;
    }
  }
  byte[] compressedData = (byte[])ms.ToArray();
  ms.Close();
  ms.Dispose();
  return System.Convert.ToBase64String(compressedData, 0, compressedData.Length);
}

Answer 2

这个很详细http://dobon.net/vb/dotnet/links/createzipfile.html

Answer 3

GZipStream只对文本中重复的字符压缩，二进制不压缩，没啥大的作用