/// <summary>

        /// 加密

        /// </summary>

        /// <param name="obj"></param>

        /// <returns></returns>

        public static string EncryptParameter(object obj)

        {

            if (obj == null)

            {

                return "";

            }

            StringBuilder builder = new StringBuilder();

            try

            {

                string str = obj.ToString();

                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();

                provider.Key = Encoding.UTF8.GetBytes(_securityKey);

                provider.IV = Encoding.UTF8.GetBytes(_securityKey);

                byte[] bytes = Encoding.UTF8.GetBytes(str);

                MemoryStream stream = new MemoryStream();

                CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);

                stream2.Write(bytes, , bytes.Length);

                stream2.FlushFinalBlock();

                foreach (byte num in stream.ToArray())

                {

                    builder.AppendFormat("{0:X2}", num);

                }

                stream.Close();

            }

            catch (Exception ex)

            {

                LogHelper.LogError(ex);

            }

            return builder.ToString();

        }

        /// <summary>

        /// 解密

        /// </summary>

        /// <param name="str"></param>

        /// <returns></returns>

        public static string DecryptParameter(string str)

        {

            try

            {

                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();

                provider.Key = Encoding.ASCII.GetBytes(_securityKey);

                provider.IV = Encoding.ASCII.GetBytes(_securityKey);

                byte[] buffer = new byte[str.Length / ];

                for (int i = ; i < (str.Length / ); i++)

                {

                    int num2 = Convert.ToInt32(str.Substring(i * , ), 0x10);

                    buffer[i] = (byte)num2;

                }

                MemoryStream stream = new MemoryStream();

                CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);

                stream2.Write(buffer, , buffer.Length);

                stream2.FlushFinalBlock();

                stream.Close();

                return Encoding.GetEncoding("GB2312").GetString(stream.ToArray());

            }

            catch

            {

                return string.Empty;

            }

        }