压缩/解压封装的类

//主要功能是可以用来减轻网络数据的传输数据量,using System;using System.Collections.Generic;using System.Collections;using System.Text;using System.IO;using System.IO.Compression;namespace CompressionService{    public class Compression    {//压缩        public int Compress(byte[] source, ref byte[] dest)        {            int resultcode;            try            {                MemoryStream ms = new MemoryStream();                //Use the Newly Created Memory Stream for the Compressed Data.                GZipStream compressedzipStream = new GZipStream(ms, CompressionMode.Compress, true);                     compressedzipStream.Write(source, 0, source.Length);                compressedzipStream.Close();                ms.Position = 0;                dest = ms.ToArray();                ms.Close();                resultcode = 1;            }            catch            {                resultcode = 0;            }            return resultcode;        }//解压public int UnCompress(byte[] source, ref byte[] dest)        {            int resultcode;             try            {                MemoryStream tempms = new MemoryStream(source);                tempms.Position = 0;                GZipStream tempzip = new GZipStream(tempms, CompressionMode.Decompress);                dest = GetDeData(tempzip, source);                tempzip.Close();                //tempms.Close();               // Console.WriteLine("临时解码数据:{0}", System.Text.Encoding.Default.GetString(dest));                resultcode = 1;            }            catch            {                resultcode = 0;            }            return resultcode;        }        public byte[] GetDeData(Stream stream,byte[] temp) //取得解压后的文件数据        {                        int totalcount = 0;            int datalen = temp.Length;            int bytecount = datalen;            while (true)            {                                byte[] tempdata = new byte[bytecount];                int bytesread = stream.Read(tempdata, 0, bytecount);                if (bytesread == 0)                    break;                              totalcount += bytesread;                bytecount =totalcount+bytesread;            }            stream.Close();                                  MemoryStream ms = new MemoryStream(temp);            GZipStream gs = new GZipStream(ms, CompressionMode.Decompress);            byte[] alltempdata =new byte[totalcount];            gs.Read(alltempdata, 0, alltempdata.Length);            gs.Close();            return alltempdata;        }    }}调用类P如下:      public static void Main()        {           CompressionService.Compression ct = new CompressionService.Compression();            byte[] origialdata = OpenFile();            Console.WriteLine("原始数据长度:{0}", origialdata.Length);            byte[] test = null;            ct.Compress(origialdata, ref test);            Console.WriteLine("压缩后数据长度:{0}", test.Length);            byte[] uncompressdata = null;            ct.UnCompress(test,ref uncompressdata);            Console.WriteLine("解压数据:{0},大小为：{1}",System.Text.Encoding.Default.GetString(uncompressdata).ToString(),uncompressdata.Length);    }        public static byte[] OpenFile()        {            //string test = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzddafdsfsfsfsdafdfa,我们是中国人";            FileStream infile = new FileStream("C:\\test.txt", FileMode.Open, FileAccess.Read, FileShare.Read);            byte[] buffer = new byte[infile.Length];            infile.Read(buffer, 0, buffer.Length);            Console.WriteLine("原始数据:{0}", System.Text.Encoding.Default.GetString(buffer));            // System.Text.Encoding.ASCII.GetString(test ));            return buffer;        }  如果用来在线压缩和解压缩文件,如下:    public void CompressFile (string sourceFile, string destinationFile )       {            // make sure the source file is there            if ( File.Exists ( sourceFile ) == false )                throw new FileNotFoundException ( );            // Create the streams and byte arrays needed            byte[] buffer = null;            FileStream sourceStream = null;            FileStream destinationStream = null;            GZipStream compressedStream = null;            try            {                // Read the bytes from the source file into a byte array                sourceStream = new FileStream ( sourceFile, FileMode.Open, FileAccess.Read, FileShare.Read );                // Read the source stream values into the buffer                buffer = new byte[sourceStream.Length];                int checkCounter = sourceStream.Read ( buffer, 0, buffer.Length );                if ( checkCounter != buffer.Length )                {                    throw new ApplicationException ( );                }                // Open the FileStream to write to                destinationStream = new FileStream ( destinationFile, FileMode.OpenOrCreate, FileAccess.Write );                // Create a compression stream pointing to the destiantion stream                compressedStream = new GZipStream ( destinationStream, CompressionMode.Compress, true );                // Now write the compressed data to the destination file                compressedStream.Write ( buffer, 0, buffer.Length );            }            catch ( ApplicationException ex )            {               // MessageBox.Show ( ex.Message, "压缩文件时发生错误：", MessageBoxButtons.OK, MessageBoxIcon.Error );            }            finally            {                // Make sure we allways close all streams                if ( sourceStream != null )                    sourceStream.Close ( );                if ( compressedStream != null )                    compressedStream.Close ( );                if ( destinationStream != null )                    destinationStream.Close ( );            }        }        public void DecompressFile ( string sourceFile, string destinationFile )        {            // make sure the source file is there            if ( File.Exists ( sourceFile ) == false )                throw new FileNotFoundException ( );            // Create the streams and byte arrays needed            FileStream sourceStream = null;            FileStream destinationStream = null;            GZipStream decompressedStream = null;            byte[] quartetBuffer = null;            try            {                // Read in the compressed source stream                sourceStream = new FileStream (sourceFile, FileMode.Open );                // Create a compression stream pointing to the destiantion stream                decompressedStream = new GZipStream (sourceStream, CompressionMode.Decompress, true );                // Read the footer to determine the length of the destiantion file                quartetBuffer = new byte[4];                int position = (int)sourceStream.Length - 4;                sourceStream.Position = position;                sourceStream.Read (quartetBuffer, 0, 4 );                sourceStream.Position = 0;                int checkLength = BitConverter.ToInt32 ( quartetBuffer, 0 );                byte[] buffer = new byte[checkLength + 100];                int offset = 0;                int total = 0;                // Read the compressed data into the buffer                while ( true )               {                    int bytesRead = decompressedStream.Read ( buffer, offset, 100 );                    if ( bytesRead == 0 )                        break;                    offset += bytesRead;                    total += bytesRead;                }                // Now write everything to the destination file                destinationStream = new FileStream ( destinationFile, FileMode.Create );                destinationStream.Write ( buffer, 0, total );                // and flush everyhting to clean out the buffer                destinationStream.Flush ( );            }            catch ( ApplicationException ex )           {                //MessageBox.Show(ex.Message, "解压文件时发生错误：", MessageBoxButtons.OK, MessageBoxIcon.Error);            }            finally           {                // Make sure we allways close all streams                if ( sourceStream != null )                    sourceStream.Close ( );                if ( decompressedStream != null )                    decompressedStream.Close ( );                if ( destinationStream != null )                    destinationStream.Close ( );            }        }