/// <summary>

        /// 将传入字符串以GZip算法压缩后，返回Base64编码字符

        /// </summary>

        /// <param name="rawString">需要压缩的字符串</param>

        /// <returns>压缩后的Base64编码的字符串</returns>

        public string GZipCompressString(string rawString)

        {

            if (string.IsNullOrEmpty(rawString) || rawString.Length == 0)

            {

                return "";

            }

            else

            {

                byte[] rawData = System.Text.Encoding.UTF8.GetBytes(rawString.ToString());

                byte[] zippedData = Compress(rawData);

                return (string)(Convert.ToBase64String(zippedData));

            }

        }

        /// <summary>

        /// GZip压缩

        /// </summary>

        /// <param name="rawData"></param>

        /// <returns></returns>

        static byte[] Compress(byte[] rawData)

        {

            MemoryStream ms = new MemoryStream();

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

            compressedzipStream.Write(rawData, 0, rawData.Length);

            compressedzipStream.Close();

            return ms.ToArray();

        }

        /// <summary>

        /// 将传入的二进制字符串资料以GZip算法解压缩

        /// </summary>

        /// <param name="zippedString">经GZip压缩后的二进制字符串</param>

        /// <returns>原始未压缩字符串</returns>

        public static string GZipDecompressString(string zippedString)

        {

            if (string.IsNullOrEmpty(zippedString) || zippedString.Length == 0)

            {

                return "";

            }

            else

            {

                byte[] zippedData = Convert.FromBase64String(zippedString.ToString());

                using (var ms = new MemoryStream(zippedData))

                {

                    using (var zip = new GZipStream(ms, CompressionMode.Decompress))

                    {

                        using (var reader = new StreamReader(zip))

                        {

                            return reader.ReadToEnd();

                        }

                    }

                }

            }

        }