#region 压缩字符串
        /// <summary>
        /// 压缩字符串
        /// </summary>
        /// <param name="unCompressedString">要压缩的字符串</param>
        /// <returns></returns>
        public static string ZipString(string unCompressedString)
        {
            byte[] bytData = System.Text.Encoding.UTF8.GetBytes(unCompressedString);
            MemoryStream ms = new MemoryStream();
            Stream s = new GZipStream(ms, CompressionMode.Compress);
            s.Write(bytData, 0, bytData.Length);
            s.Close();
            byte[] compressedData = (byte[])ms.ToArray();
            return System.Convert.ToBase64String(compressedData, 0, compressedData.Length);
        }
        #endregion
        #region 解压字符串
        /// <summary>
        ///  解压字符串
        /// </summary>
        /// <param name="unCompressedString">要解压的字符串</param>
        /// <returns></returns>
        public static string UnzipString(string unCompressedString)
        {
            System.Text.StringBuilder uncompressedString = new System.Text.StringBuilder();
            byte[] writeData = new byte[4096];
            byte[] bytData = System.Convert.FromBase64String(unCompressedString);
            int totalLength = 0;
            int size = 0;
            Stream s = new GZipStream(new MemoryStream(bytData), CompressionMode.Decompress);
            while (true)
            {
                size = s.Read(writeData, 0, writeData.Length);
                if (size > 0)
                {
                    totalLength += size;
                    uncompressedString.Append(System.Text.Encoding.UTF8.GetString(writeData, 0, size));
                }
                else
                {
                    break;
                }
            }
            s.Close();
            return uncompressedString.ToString();
        }