【下载文档:  Ajax+asp.net实现用户登陆.txt 】

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Ajax+asp.net实现用户登陆
以用户登录为例练习ajax的使用方法
login.html


登录
用户名：
密码：

DAL.cs
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
namespace AJAXtest
{
public class DAL
{
private string connstr = "server=acer-pc;database=mydatabase;user id=sa;password=123456";
public DataTable selectDB(string sql)
{
DataTable dt = new DataTable();
try
{
SqlConnection conn = new SqlConnection(connstr);
SqlDataAdapter sda = new SqlDataAdapter(sql, conn);
sda.Fill(dt);
}
catch(Exception e)
{}
return dt;
}
}
}
BLL.cs
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
namespace AJAXtest
{
public class BLL
{
public bool login(string username,string password)
{
try
{
string sql = "select password from Users where username='" + username + "'";
DAL sqlSelect = new DAL();
DataTable dt = sqlSelect.selectDB(sql);
if (dt.Rows[0]["password"].ToString() != password)
return false;
}
catch (Exception)
{
}
return true;
}
}
}
Server.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace AJAXtest
{
public partial class Server : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string username = Request["username"].ToString();
string password = Request["password"].ToString();
BLL b = new BLL();
if (b.login(username, password))
{
Response.Write("登录成功");
Response.End();
}
else
{
Response.Write("登录失败");
Response.End();
}
}
}
}
Server.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Server.aspx.cs" Inherits="AJAXtest.Server" %>

以上所述就是本文的全部内容了，希望大家能够喜欢。