using System;

using System.Security.Cryptography;

using System.Text;

using System.IO;

using System.Web;

​

public class Program

{

​

     private static string Encrypt(string strText, string strEncrKey)

        {

            byte[] byKey;

            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

​

​

            try

            {

                byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0, 8));

                DESCryptoServiceProvider des = new DESCryptoServiceProvider();

                byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);

                MemoryStream ms = new MemoryStream();

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

                cs.Write(inputByteArray, 0, inputByteArray.Length);

                cs.FlushFinalBlock();

                return Convert.ToBase64String(ms.ToArray());

            }

            catch (Exception ex)

            {

​

​

                return ex.Message;

            }

        }

        public static void Main()

    {

        Console.WriteLine(Encrypt("124414","&%#@?,:*"));

        Console.WriteLine(System.Web.HttpUtility.UrlEncode(Encrypt("124414","&%#@?,:*")));

        Console.WriteLine(System.Web.HttpUtility.UrlEncode(Encrypt("124414","&%#@?,:*")).Replace("%","_"));

    }

}