/// <summary> 
    /// DES 加解密
    /// </summary> 
    public class DES
    {
        /// <summary>
        /// DES加密，对接其他语言使用同一规则用
        /// </summary>
        /// <param name="pToEncrypt"></param>
        /// <param name="key"></param>
        /// <param name="IV"></param>
        /// <returns></returns>
        public static string EncryptString(string pToEncrypt, string key, string IV)
        {
            Byte[] keyArray = new byte[32];
            keyArray = System.Text.UTF8Encoding.UTF8.GetBytes(key);
            Byte[] ivArray = new byte[32];
            ivArray = System.Text.UTF8Encoding.UTF8.GetBytes(IV);
            Byte[] toEncryptArray = System.Text.UTF8Encoding.UTF8.GetBytes(pToEncrypt);
            System.Security.Cryptography.RijndaelManaged rDel = new System.Security.Cryptography.RijndaelManaged();
            rDel.Key = keyArray;
            rDel.IV = ivArray;
            rDel.Mode = System.Security.Cryptography.CipherMode.CBC;
            rDel.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
            System.Security.Cryptography.ICryptoTransform cTransform = rDel.CreateEncryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }    
        /// <summary>
        /// DES加密
        /// </summary>
        /// <param name="input">待加密的字符串</param>
        /// <param name="key">加密密钥</param>
        /// <returns></returns>
        public static string Encrypt(string EncryptString, byte[] Key, byte[] IV)
        {
            //byte[] rgbKey = Encoding.UTF8.GetBytes(key.Substring(0, 8));
            byte[] inputByteArray = Encoding.UTF8.GetBytes(EncryptString);
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            MemoryStream mStream = new MemoryStream();
            CryptoStream cStream = new CryptoStream(mStream, des.CreateEncryptor(Key, IV), CryptoStreamMode.Write);
            cStream.Write(inputByteArray, 0, inputByteArray.Length);
            cStream.FlushFinalBlock();
            return Convert.ToBase64String(mStream.ToArray());
        }
        /// <summary>
        /// DES解密
        /// </summary>
        /// <param name="input">待解密的字符串</param>
        /// <param name="key">解密密钥,要求为8位,和加密密钥相同</param>
        /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
        public static string Decrypt(string DecryptString, byte[] Key, byte[] IV)
        {
            try
            {
                //byte[] rgbKey = Encoding.UTF8.GetBytes(Key);
                byte[] inputByteArray = Convert.FromBase64String(DecryptString);
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, des.CreateDecryptor(Key, IV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Encoding.UTF8.GetString(mStream.ToArray());
            }
            catch
            {
                return "";
            }
        }
    }