文件压缩

 /// <summary>    /// 文件压缩    /// </summary>    /// using System.IO;    /// using System.IO.Compression;    /// <param name="strOrigPath">原始图片路径</param>    /// <param name="strAimPath">目标图片路径</param>    /// <param name="GzipName">最终文件名</param>    ///  /// <param name="strExt">扩展名称</param>    private void GZipStream(string strOrigPath, string strAimPath, string GzipName,string strExt)    {        try        {            //文件流             FileStream reader;            //要压缩的文件路径            reader = File.Open(strOrigPath, FileMode.Open);            FileStream writer;            writer = File.Create(strAimPath);             //压缩相关的流             MemoryStream ms = new MemoryStream();            GZipStream zipStream = new GZipStream(ms, CompressionMode.Compress, true);             //往压缩流中写数据             byte[] sourceBuffer = new byte[reader.Length];            reader.Read(sourceBuffer, 0, sourceBuffer.Length);            zipStream.Write(sourceBuffer, 0, sourceBuffer.Length);             //一定要在内存流读取之前关闭压缩流             zipStream.Close();            zipStream.Dispose();            //从内存流中读数据             ms.Position = 0; //注意，不要遗漏此句             byte[] destBuffer = new byte[ms.Length];            //ms.Read(destBuffer, 0, destBuffer.Length);             byte[] header = new byte[10];            ms.Read(header, 0, 10);            header[3] = 8;        //表示包含文件名信息            byte[] fielContent = new byte[ms.Length - 10];            ms.Read(fielContent, 0, fielContent.Length);             string strfilename = GzipName + strExt; //指定初始文件名             byte[] filename = System.Text.Encoding.Default.GetBytes(strfilename);             writer.Write(header, 0, header.Length);            writer.Write(filename, 0, filename.Length);            writer.WriteByte(0); //文件名以0 字节结束            writer.Write(fielContent, 0, fielContent.Length);        }        catch        {         }        finally        {             //关闭并释放内存流             ms.Close();            ms.Dispose();            //关闭并释放文件流             writer.Close();            writer.Dispose();            reader.Close();            reader.Dispose();        }    }