压缩和解压缩

 public enum CompressAlgorithm    {        GZip,        DeflateStream    }    public class Compressor    {        private CompressAlgorithm algorithm;        public Compressor(CompressAlgorithm algorithm)        {            this.algorithm = algorithm;        }        //压缩数组        public ArraySegment<byte> Compress(ArraySegment<byte> data)        {            MemoryStream ms = new MemoryStream();            Stream compressStream = new GZipStream(ms, CompressionMode.Compress, true);            compressStream.Write(data.Array, 0, data.Count);            compressStream.Close();            byte[] newByteArray = new byte[ms.Length];            ms.Seek(0, SeekOrigin.Begin);            ms.Read(newByteArray, 0, newByteArray.Length);            ArraySegment<byte> bytes = new ArraySegment<byte>(newByteArray);            return bytes;        }        //压缩流        public Stream Compress(Stream stream)        {            MemoryStream ms = new MemoryStream();            if (algorithm == CompressAlgorithm.GZip)            {                Stream compressStream = new GZipStream(ms, CompressionMode.Compress, true);                byte[] buffer = new byte[stream.Length];                stream.Read(buffer, 0, buffer.Length);                compressStream.Write(buffer, 0, buffer.Length);                compressStream.Close();            }            else            {                Stream compressStream = new DeflateStream(ms, CompressionMode.Compress, true);                byte[] buffer = new byte[stream.Length];                stream.Read(buffer, 0, buffer.Length);                compressStream.Write(buffer, 0, buffer.Length);                compressStream.Close();            }            return ms;        }        //解压缩数组        public ArraySegment<byte> DeCompress(ArraySegment<byte> data)        {            MemoryStream ms = new MemoryStream();            ms.Write(data.Array, 0, data.Count);            ms.Seek(0, SeekOrigin.Begin);            if (algorithm == CompressAlgorithm.GZip)            {                Stream compressStream = new GZipStream(ms, CompressionMode.Decompress, false);                byte[] newByteArray = RetrieveBytesFromStream(compressStream, 1);                compressStream.Close();                return new ArraySegment<byte>(newByteArray);            }            else            {                Stream compressStream = new DeflateStream(ms, CompressionMode.Decompress, false);                byte[] newByteArray = RetrieveBytesFromStream(compressStream, 1);                compressStream.Close();                return new ArraySegment<byte>(newByteArray);            }        }        //解压缩数组        public Stream DeCompress(Stream stream)        {            stream.Seek(0, SeekOrigin.Begin);            if (algorithm == CompressAlgorithm.GZip)            {                Stream compressStream = new GZipStream(stream, CompressionMode.Decompress, false);                byte[] newByteArray = RetrieveBytesFromStream(compressStream, 1);                compressStream.Close();                return new MemoryStream(newByteArray);            }            else            {                Stream compressStream = new DeflateStream(stream, CompressionMode.Decompress, false);                byte[] newByteArray = RetrieveBytesFromStream(compressStream, 1);                compressStream.Close();                return new MemoryStream(newByteArray);            }        }        public byte[] RetrieveBytesFromStream(Stream stream, int bytesblock)        {            List<byte> lst = new List<byte>();            byte[] data = new byte[1024];            int totalCount = 0;            while (true)            {                int bytesRead = stream.Read(data, 0, data.Length);                if (bytesRead == 0)                {                    break;                }                byte[] buffers = new byte[bytesRead];                Array.Copy(data, buffers, bytesRead);                lst.AddRange(buffers);                totalCount += bytesRead;            }            return lst.ToArray();        }        //压缩数组        public static byte[] Compress(byte[] data)        {            MemoryStream stream = new MemoryStream();            GZipStream gZipStream = new GZipStream(stream, CompressionMode.Compress);            gZipStream.Write(data, 0, data.Length);            gZipStream.Close();            return stream.ToArray();        }        //解压缩数组        public static byte[] Decompress(byte[] data)        {            MemoryStream stream = new MemoryStream();            GZipStream gZipStream = new GZipStream(new MemoryStream(data), CompressionMode.Decompress);            byte[] bytes = new byte[40960];            int n;            while ((n = gZipStream.Read(bytes, 0, bytes.Length)) != 0)            {                stream.Write(bytes, 0, n);            }            gZipStream.Close();            return stream.ToArray();        }

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序列化-----压缩过的。

  public static ParaTemplate GetTemplate(string id)        {            byte[] bytes = GetTemplateByte(id);            return GetTemplate(bytes);        }        public static ParaTemplate GetTemplate(byte[] bytes)        {            ParaTemplate template = null;            if (bytes == null)            {                return template;            }            try            {                bytes = Compressor.Decompress(bytes);                Stream s = new MemoryStream();                BinaryWriter writer = new BinaryWriter(s);                s.Write(bytes, 0, bytes.Length);                s.Seek(0, SeekOrigin.Begin);                IFormatter formatter = new BinaryFormatter();                template = formatter.Deserialize(s) as ParaTemplate;                s.Close();            }            catch            {                throw new Exception("参数模板反序列化错误！");            }            return template;        }        public static byte[] GetTemplateByte(string templateid)        {            byte[] bytes = null;            //string files = string.Format(fileFormat, System.Windows.Forms.Application.LocalUserAppDataPath, templateid);            //if (System.IO.File.Exists(files))            //{            //    bytes = System.IO.File.ReadAllBytes(files);            //}            //else            //{            string sql = @"select byte from template where t.templateid = '{0}'";            object obj = OracleHelp.DB.ExecScalar(string.Format(sql, eid));            bytes = obj as byte[];            //}            return bytes;        }        public static Byte[] ObjectToByte(object obj)        {            Stream s = new MemoryStream();            BinaryFormatter formatter = new BinaryFormatter();            try            {                formatter.Serialize(s, obj);            }            catch (Exception ex)            {                System.Windows.Forms.MessageBox.Show("Template To Byte Error！");            }            byte[] buffer = new byte[s.Length];            s.Seek(0, SeekOrigin.Begin);            s.Read(buffer, 0, buffer.Length);            s.Close();            return Compressor.Compress(buffer);        }