C#压缩的实现方法

 

        /// <summary>
        /// table XML序列化并压缩
     /// </summary>
        /// <param name="table"></param>
        /// <param name="encryptor"></param>
        /// <returns></returns>
        public static byte[] Compress(DataTable table, ICryptoTransform encryptor)
        {
            byte[][] zipData = new byte[2][];
            using (MemoryStream ms = new MemoryStream())
            {
                //对字节流进行加密
                using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
                {
                    using (GZipStream zs = new GZipStream(cs, CompressionMode.Compress, true))
                    {
                        using (BufferedStream bs = new BufferedStream(zs))
                        {
                            table.WriteXmlSchema(bs);
                            bs.Close();
                        }
                        zs.Close();
                    }
                    cs.FlushFinalBlock();
                    cs.Close();
                }
                zipData[0] = ms.ToArray();
                ms.Close();
            }
            using (MemoryStream ms = new MemoryStream())
            {
                using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
                {
                    using (GZipStream zs = new GZipStream(cs, CompressionMode.Compress, true))
                    {
                        using (BufferedStream bs = new BufferedStream(zs))
                        {
                            table.WriteXml(bs);
                            bs.Close();
                        }
                        zs.Close();
                    }
                    cs.FlushFinalBlock();
                    cs.Close();
                }
                zipData[1] = ms.ToArray();
                ms.Close();
            }
            //释放table的资源
            table.Clear();
            table.Dispose();

            byte[] outData;
            using (MemoryStream ms2 = new MemoryStream())
            {
                IFormatter formatter = new BinaryFormatter();
                formatter.Serialize(ms2, zipData);
                outData = ms2.ToArray();
                ms2.Close();
                ms2.Position = 0;
            }
            //释放zipData的资源
            GC.SuppressFinalize(zipData);
            return outData;
        }

        /// <summary>
        /// table XML序列化并压缩  不加密
        /// </summary>
        /// <param name="table"></param>
        /// <returns></returns>
        public static byte[] Compress(DataTable table)
        {
            byte[][] zipData = new byte[2][];
            using (MemoryStream ms = new MemoryStream())
            {
                using (GZipStream zs = new GZipStream(ms, CompressionMode.Compress, true))
                {
                    using (BufferedStream bs = new BufferedStream(zs))
                    {
                        table.WriteXmlSchema(bs);
                        bs.Close();
                    }
                    zs.Close();
                }
                zipData[0] = ms.ToArray();
                ms.Close();
            }
            using (MemoryStream ms = new MemoryStream())
            {
                using (GZipStream zs = new GZipStream(ms, CompressionMode.Compress, true))
                {
                    using (BufferedStream bs = new BufferedStream(zs))
                    {
                        table.WriteXml(bs);
                        bs.Close();
                    }
                    zs.Close();
                }
                zipData[1] = ms.ToArray();
                ms.Close();
            }
            //释放table的资源
            table.Clear();
            table.Dispose();

            byte[] resutData;
            using (MemoryStream ms = new MemoryStream())
            {
                IFormatter formatter = new BinaryFormatter();
                formatter.Serialize(ms, zipData);
                resutData = ms.ToArray();
                ms.Close();
                ms.Position = 0;
            }
            //释放zipData的资源
            GC.SuppressFinalize(zipData);
            return resutData;
        }