using
System;

using System.Data;

using System.IO;

using ICSharpCode.SharpZipLib.Zip.Compression;

using ICSharpCode.SharpZipLib.Zip.Compression.Streams;

using ICSharpCode.SharpZipLib.GZip;



/**////
<summary>

/// Summary description for ICSharp

///
</summary>

public
class ICSharp

{

   
public ICSharp()

   
{

       
//

       
// TODO: Add constructor logic here

       
//

    }

   
/**////
<summary>

   
/// 压缩

   
/// </summary>

   
/// <param name="param"></param>

   
/// <returns></returns>

   
public
string Compress(string param)

   
{

       
byte[] data
= System.Text.Encoding.UTF8.GetBytes(param);

       
//byte[] data = Convert.FromBase64String(param);

        MemoryStream ms
= new MemoryStream();

        Stream stream
= new ICSharpCode.SharpZipLib.BZip2.BZip2OutputStream(ms);

       
try

       
{

            stream.Write(data,
, data.Length);

        }

       
finally

       
{

            stream.Close();

            ms.Close();

        }

       
return Convert.ToBase64String(ms.ToArray());

    }

   
/**////
<summary>

   
/// 解压

   
/// </summary>

   
/// <param name="param"></param>

   
/// <returns></returns>

   
public
string Decompress(string param)

   
{

       
string commonString="";

       
byte[] buffer=Convert.FromBase64String(param);

        MemoryStream ms
= new MemoryStream(buffer);

        Stream sm
= new ICSharpCode.SharpZipLib.BZip2.BZip2InputStream(ms);

       
//这里要指明要读入的格式，要不就有乱码

        StreamReader reader
= new StreamReader(sm,System.Text.Encoding.UTF8);

       
try

       
{

            commonString=reader.ReadToEnd();

        }

       
finally

       
{

            sm.Close();

            ms.Close();

        }

       
return commonString;

    }

}



Encoding.UTF8与Convert.FromBase64String