/// <summary>

        /// 压缩方法

        /// </summary>

        public static string CompressString(string str)

        {

            string compressString = "";

            byte[] compressBeforeByte = Encoding.GetEncoding("UTF-8").GetBytes(str);

            byte[] compressAfterByte = Compress(compressBeforeByte);

            compressString = Convert.ToBase64String(compressAfterByte);

            return compressString;

        }

        public static byte[] Compress(byte[] data)

        {

            try

            {

                MemoryStream ms = new MemoryStream();

                GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true);

                zip.Write(data, , data.Length);

                zip.Close();

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

                ms.Position = ;

                ms.Read(buffer, , buffer.Length);

                ms.Close();

                return buffer;

            }

            catch (Exception e)

            {

                throw new Exception(e.Message);

            }

        }

        /// <summary>

        /// 字符串解压缩

        /// </summary>

        public static string DecompressString(string str)

        {

            string compressString = "";

            byte[] compressBeforeByte = Convert.FromBase64String(str);

            byte[] compressAfterByte = Decompress(compressBeforeByte);

            compressString = Encoding.GetEncoding("UTF-8").GetString(compressAfterByte);

            return compressString;

        }

        public static byte[] Decompress(byte[] data)

        {

            try

            {

                MemoryStream ms = new MemoryStream(data);

                GZipStream zip = new GZipStream(ms, CompressionMode.Decompress, true);

                MemoryStream msreader = new MemoryStream();

                byte[] buffer = new byte[0x1000];

                while (true)

                {

                    int reader = zip.Read(buffer, , buffer.Length);

                    if (reader <= )

                    {

                        break;

                    }

                    msreader.Write(buffer, , reader);

                }

                zip.Close();

                ms.Close();

                msreader.Position = ;

                buffer = msreader.ToArray();

                msreader.Close();

                return buffer;

            }

            catch (Exception e)

            {

                throw new Exception(e.Message);

            }

        }