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标题 Ajax+asp.net实现用户登陆
内容
    这篇文章主要介绍了Ajax+asp.net实现用户登陆,主要是为了练习ajax的使用方法,有需要的小伙伴参考下。
    以用户登录为例练习ajax的使用方法
    login.html
    <!DOCTYPE html>
    <html xmlns="">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
    <script type="text/javascript">
    var obj = createobj();
    function login(name, pwd)
    {
    var urlstr = "=" + name + "&password=" + pwd;
    obj.open("get", urlstr, true);
    obj.onreadystatechange = dowork;
    obj.send();
    }
    function dowork()
    {
    if (obj.readyState == 4)
    {
    if (obj.status == 200)
    {
    document.getElementById("msg").innerText = obj.responseText;
    }
    }
    }
    //创建对象
    function createobj()
    {
    var xmlHttp = null;
    try {
    //非IE浏览器
    xmlHttp = new XMLHttpRequest();
    }
    catch (e)
    { //IE浏览器
    try{
    xmlHttp = new ActiveXObject("Msxml2.HTTP");
    }
    catch (e)
    {
    xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    }
    return xmlHttp;
    }
    </script>
    </head>
    <body>
    <table>
    <tr>
    <td colspan="2">登录</td>
    </tr>
    <tr>
    <td>用户名:</td>
    <td><input type="text" id="username" name="username" /></td>
    </tr>
    <tr>
    <td>密码:</td>
    <td><input type="password" id="password" name="password" /></td>
    </tr>
    <tr>
    <td >
    <input type="submit" value="登录" onclick="login(document.getElementById('username').value,document.getElementById('password').value)" />
    </td>
    <td>
    <input type="reset" value="清空" />
    </td>
    <td><span id="msg"></span></td>
    </tr>
    </table>
    </body>
    </html>
    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" %>
    <!DOCTYPE html>
    <html xmlns="">
    <head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
    </head>
    <body>
    <form id="form1" runat="server">
    <div>
    </div>
    </form>
    </body>
    </html>
    Ajax+asp.net实现用户登陆 三联
    
    以上所述就是本文的全部内容了,希望大家能够喜欢。
随便看

 

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更新时间:2025/5/22 21:24:49