/// <summary>

    /// DES加密/解密类。

    /// </summary>

    public class DESEncrypt

    {

        public DESEncrypt()

        {

        }

        #region ========加密======== 

        /// <summary>

        /// 加密

        /// </summary>

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

        /// <returns></returns>

        public static string Encrypt(string Text)

        {

            return Encrypt(Text,"MATICSOFT");

        }

        /// <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)

        {

            return Decrypt(Text,"MATICSOFT");

        }

        /// <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 

    }