System.IO.Compression.GZipStream

/// <summary>

/// 压缩

/// </summary>

/// <param name="srcFile"></param>

/// <param name="zipFile"></param>

public static void Compress(string srcFile, string zipFile)

{

    FileStream fsSrc = File.Open(srcFile, FileMode.Open);

    FileStream fsDes = File.Create(zipFile);

    GZipStream compress = new GZipStream(fsDes, CompressionMode.Compress);



    try

    {

        byte[] buffer = new byte[fsSrc.Length];

        fsSrc.Read(buffer, 0, (int)fsSrc.Length);



        compress.Write(buffer, 0, buffer.Length);

        compress.Flush();

    }

    finally

    {

        compress.Close();

        fsDes.Close();

        fsSrc.Close();

    }

}



/// <summary>

/// 解压

/// </summary>

/// <param name="zipFile"></param>

/// <param name="desFile"></param>

public static void Decompress(string zipFile, string desFile)

{

    FileStream fsSrc = File.Open(zipFile, FileMode.Open);

    GZipStream compress = new GZipStream(fsSrc, CompressionMode.Decompress);

    FileStream fsDes = File.Create(desFile);



    try

    {

        byte[] buffer = new byte[1024 * 10];



        int i = 0;

        while ((i = compress.Read(buffer, 0, buffer.Length)) > 0)

        {

            if (i > 0)

            {

                fsDes.Write(buffer, 0, i);

            }

        }



        fsDes.Flush();

    }

    finally

    {

        fsDes.Close();

        compress.Close();

        fsSrc.Close();

    }

}