登录MD5加盐处理

一：解决方案资源管理器截图：

二：operatorDAL.cs代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HRMSys.Model;
using System.Data.SqlClient;
using System.Data;

namespace HRMSys.DAL
{
    public class OperatorDAL
    {
        /// <summary>
        /// 插入一个用户
        /// </summary>
        /// <param name="op"></param>
        public void insertUser(Operator op)
        {
            sqlhelper.ExecuteNon(@"insert into T_Operator (Id,UserName,Password) values (newid(),@UserName,@Password)",
                                new SqlParameter ("@UserName",op.UserName),
                                new SqlParameter ("@Password",op.Password));
        }
        /// <summary>
        /// 将表的形式转换为vs的形式,给对象
        /// </summary>
        /// <param name="row"></param>
        /// <returns></returns>
        private Operator ToOperator(DataRow row)
        {
            Operator op = new Operator();
            op.Id = (Guid)row["Id"];//不加就可以检查用户名是否重复了
            op.UserName = (string)row["UserName"];
            op.Password = (string)row["Password"];
            return op;
        }
        /// <summary>
        ///查询指定username的一条数据
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public Operator loginUser(string name)
        {
            
             
             DataTable table = sqlhelper.datatable("select * from T_Operator where UserName=@UserName",
                 new SqlParameter ("@UserName",name));
             if (table.Rows.Count <= 0)
                 return null;

             else if (table.Rows.Count > 1)
                 throw new Exception("用户名重复");
             else
             {
                 DataRow row = table.Rows[0];

                 return ToOperator(row);
             }
        }
    }
}

三：commonhelper.cs代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;

namespace HYMSys.UI
{
    class CommonHelper
    {
        /// <summary>
        /// MD5加密算法,将添加的用户名和密码加密
        /// </summary>
        /// <param name="sDataIn"></param>
        /// <returns></returns>
        public static string GetMD5(string sDataIn)
        {
            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            byte[] bytValue, bytHash;
            bytValue = System.Text.Encoding.UTF8.GetBytes(sDataIn);
            bytHash = md5.ComputeHash(bytValue);
            md5.Clear();
            string sTemp = "";
            for (int i = 0; i < bytHash.Length; i++)
            {
                sTemp += bytHash[i].ToString("X").PadLeft(2, '0');
            }
            return sTemp.ToLower();
        }
    }
}

四：hrmsys.cs代码，用于添加用户

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using HRMSys.Model;
using HRMSys.DAL;

namespace HYMSys.UI
{
    public partial class HRMSys : Form
    {
        public HRMSys()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 添加一个用户
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 操作管理员ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //MD5将要添加的用户名和密码加密
            Operator op = new Operator();
            op.UserName = CommonHelper.GetMD5( "hmj"+"Love@.>1");
            op.Password = CommonHelper.GetMD5("123" + "Love@.>1");

            OperatorDAL opDal = new OperatorDAL();
            opDal.insertUser(op);
            
        }
    }
}

五：login.cs代码，用于登录

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using HRMSys.Model;
using HRMSys.DAL;

namespace HYMSys.UI
{
    public partial class login : Form
    {
        public login()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 登录
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            OperatorDAL opDAL=new OperatorDAL();
            //无法直接调用sqlhelper,通过operatorDAL的方法掉用sqlhelper
            string name=CommonHelper.GetMD5(tb_name.Text + "Love@.>1");
            string password=CommonHelper.GetMD5(tb_pwd.Text+ "Love@.>1");
            Operator op = opDAL.loginUser(name);
            if (op == null)
                MessageBox.Show("用户名不存在");
            else if (op.Password != password)
                MessageBox.Show("用户名或密码错误");
            else
            {
                HRMSys form = new HRMSys();
                form.Show();
                this.Hide();
 
            }
           

        }
    }
}