1using System;
 2using System.Text;
 3using System.IO;
 4using System.Web.UI;
 5using System.Web.UI.WebControls;
 6using System.Data.OleDb;
 7using System.Data;
 8using System.Web;
 9using System.Collections.Generic;
10using System.Security.Cryptography;
11
12//该源码下载自www.a s p x 1.com(5１ａｓｐｘ．ｃｏｍ)
13//工具类
14public class Tools
15...{
16    public Tools()
17    ...{
18    }
19    // 得到加密字符串
20    //strText:要加密字符串;strEncrKey:密钥;返回：加密后字符串
21    public static string Encrypt(string strText, string strEncrKey)//加密函数
22    ...{
23        byte[] byKey = null;//初始化密钥
24        byte[] IV = ...{ 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, 0x11, 0x12 };
25        try
26        ...{
27            byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey);//获取密钥
28            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
29            byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);//输入的字符串转化成字节型
30            MemoryStream ms = new MemoryStream();
31            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
32            cs.Write(inputByteArray, 0, inputByteArray.Length);//输出加密流
33            cs.FlushFinalBlock();
34            return Convert.ToBase64String(ms.ToArray());
35        }
36        catch (System.Exception error)
37        ...{
38            return "error:" + error.Message + "\r";
39        }
40    }
41}
42