看了三层架构后的第一个实例

今天看了三层架构，所以我写了个Login的Test。

/Files/jessie/3layer1.jpg

DAO.aspx

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using UserModel;

namespace UserDAL
{
    public class DAO
    {
        public UserModel.Class1 excute(string sql)
        {
            using (SqlConnection conn = new SqlConnection(Utils.GetConString()))
            {
                UserModel.Class1 user = null;
                conn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.CommandText = sql;
                cmd.Connection = conn;
                SqlDataReader sdr = cmd.ExecuteReader();
                while (sdr.Read())
                {
                    if (user == null)
                    {
                        user = new UserModel.Class1();
                    }
                    user.UserName = sdr.GetString(0);
                    user.Password = sdr.GetString(1);              
                }
                return user;
            }
        }

    }
}

BAO.aspx

using System;
using System.Collections.Generic;
using System.Text;

namespace BLL
{
    public class BAO
    {
        public UserModel.Class1 CheckUserName(string userName,string password)
        {
            string sql = "select userName,password from Users where userName='"+userName+"' and password='"+password+"'";
            UserDAL.DAO dao = new UserDAL.DAO();
            UserModel.Class1 user=dao.excute(sql);
                return user;
       
        }
    }
}

Utils.aspx

namespace UserDAL
{
    public class Utils
    {
        public static string GetConString()
        {
            string mailto:strCon=@%22server=JERRY\SQLEXPRESS;database=jerryzhang;uid=sa;password=123456;";
            return strCon;
        }
    }
}

UserModel

using System;
using System.Collections.Generic;
using System.Text;

namespace UserModel
{
    public class Class1
    {
        private string  userName;

        public string  UserName
        {
            get { return userName; }
            set { userName = value; }
        }
        private string password;

        public string Password
        {
            get { return password; }
            set { password = value; }
        }
        private string email;

        public string Email
        {
            get { return email; }
            set { email = value; }
        }
        private int id;

        public int ID
        {
            get { return id; }
            set { id = value; }
        }
 

    }
}

Login.aspx

protected void btnLogin_Click(object sender, EventArgs e)
    {
        BLL.BAO bao = new BAO();
        string userName=this.txtUserName.Text.Trim();
        string password = this.txtPassword.Text;
        UserModel.Class1 user= bao.CheckUserName(userName,password);
        Response.Write("Login sucessfully");
      
    }

虽然有些东西为了简单点没有判断，不过感觉还不错！