2017-6-22 关于MD5加密 别忘了引命名空间

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace Secret
{
    public class MD5
    {
        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="s">需要加密的字符串</param>
        /// <returns></returns>
        public static string EncryptMD5(string s)
        {
            var md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
            var result = "";
            if (!string.IsNullOrWhiteSpace(s))
            {
                result = BitConverter.ToString(md5.ComputeHash(UnicodeEncoding.UTF8.GetBytes(s.Trim())));
            }
            return result;
        }
    }

    public class DES
    {
        //DES加密秘钥，要求为8位
        private const string desKey = "xianglk1";
        //默认密钥向量
        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

        /// <summary>
        /// DES加密
        /// </summary>
        /// <param name="encryptString">待加密的字符串，未加密成功返回原串</param>
        /// <returns></returns>
        public static string EncryptDES(string encryptString)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(desKey);
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Convert.ToBase64String(mStream.ToArray());
            }
            catch
            {
                return encryptString;
            }
        }

        /// <summary>
        /// DES解密
        /// </summary>
        /// <param name="decryptString">待解密的字符串，未解密成功返回原串</param>
        /// <returns></returns>
        public static string DecryptDES(string decryptString)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(desKey);
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Convert.FromBase64String(decryptString);
                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Encoding.UTF8.GetString(mStream.ToArray());
            }
            catch
            {
                return decryptString;
            }
        }

    }
}

<%@ WebHandler Language="C#" Class="insert" %>

using System;
using System.Web;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Secret;
public class insert : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {


        using (DatayilanDataContext con = new DatayilanDataContext())
        {
            string password = MD5.EncryptMD5(context.Request["password"]);
            users u = new users();
            u.username = context.Request["username"];
            u.password = password;
            u.sex = Convert.ToBoolean(context.Request["sex"]);
            u.email = context.Request["email"];
            u.birthday = Convert.ToDateTime(context.Request["birthday"]);
            u.phone = context.Request["phone"];
            u.country = context.Request["country"];
            u.province = context.Request["province"];
            u.city = context.Request["city"];
            u.detailaddr = context.Request["detailaddr"];
            u.postcode = context.Request["postcode"];
            u.American = context.Request["American"];
            u.asset = context.Request["asset"];
            u.income = context.Request["income"];
            u.employment = context.Request["employment"];
            u.business = context.Request["business"];
            u.experience = context.Request["experience"];
            u.account = context.Request["account"];
            u.idnumber = context.Request["idnumber"];


            con.users.InsertOnSubmit(u);
            con.SubmitChanges();

        }
         context.Response.End();
        
        
        
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}

<%@ WebHandler Language="C#" Class="denglu" %>

using System;
using System.Web;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Secret;
public class denglu : IHttpHandler {
   
    
    public void ProcessRequest (HttpContext context) {

        string end = "{\"has\":\"false\"}";
        string username = context.Request["username"];
        string password =MD5.EncryptMD5( context.Request["password"]);
        
        using(DatayilanDataContext con=new DatayilanDataContext())
        
        {
            users u = con.users.Where(r => r.username == username&&r.password==password).FirstOrDefault();
            if (u != null)
            {
                end = "{\"has\":\"true\",\"id\":\""+u.ids+"\"}";
            }
            context.Response.Write(end);
            context.Response.End();
        }
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}