#region ========加密========

         /// <summary>

         /// 加密

         /// </summary>

         /// <param name="Text"></param>

         /// <returns></returns>

         public static string Encrypt(string Text)

         {

             if (Text == null)

                 return Text;

             return Encrypt(Text, "123456789abcd");

         }

         /// <summary>

         /// 加密数据

         /// </summary>

         /// <param name="Text"></param>

         /// <param name="sKey"></param>

         /// <returns></returns>

         public static string Encrypt(string Text, string sKey)

         {

             DESCryptoServiceProvider des = new DESCryptoServiceProvider();

             byte[] inputByteArray;

             inputByteArray = Encoding.Default.GetBytes(Text);

             des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));

             des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));

             System.IO.MemoryStream ms = new System.IO.MemoryStream();

             CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);

             cs.Write(inputByteArray, , inputByteArray.Length);

             cs.FlushFinalBlock();

             StringBuilder ret = new StringBuilder();

             foreach (byte b in ms.ToArray())

             {

                 ret.AppendFormat("{0:X2}", b);

             }

             return ret.ToString();

         }

         #endregion

         #region ========解密========

         /// <summary>

         /// 解密

         /// </summary>

         /// <param name="Text"></param>

         /// <returns></returns>

         public static string Decrypt(string Text)

         {

             if (Text == null)

                 return Text;

             return Decrypt(Text, "123456789abcd");

         }

         /// <summary>

         /// 解密数据

         /// </summary>

         /// <param name="Text"></param>

         /// <param name="sKey"></param>

         /// <returns></returns>

         public static string Decrypt(string Text, string sKey)

         {

             DESCryptoServiceProvider des = new DESCryptoServiceProvider();

             int len;

             len = Text.Length / ;

             byte[] inputByteArray = new byte[len];

             int x, i;

             for (x = ; x < len; x++)

             {

                 i = Convert.ToInt32(Text.Substring(x * , ), );

                 inputByteArray[x] = (byte)i;

             }

             des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));

             des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));

             System.IO.MemoryStream ms = new System.IO.MemoryStream();

             CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);

             cs.Write(inputByteArray, , inputByteArray.Length);

             cs.FlushFinalBlock();

             return Encoding.Default.GetString(ms.ToArray());

         }                    #endregion