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1、Ajax+实现用户登陆_ 这篇文章主要介绍了Ajax+实现用户登陆，主要是为了练习ajax的用法方法，有需要的小伙伴参考下。 以用户登录为例练习ajax的用法方法 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 +
2、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扫瞄器 xmlHttp = new XMLHttpReques
3、t(); catch (e) /IE扫瞄器 try xmlHttp = new ActiveXObject(Msxml2.HTTP); catch (e) xmlHttp = new ActiveXObject(Microsoft.XMLHTTP); return xmlHttp; /script /head body table tr td align=center colspan=2登录/td /tr tr td用户名：/td tdinput type=text id=username name=username /td /tr tr td密码：/td tdinput type=passw
4、ord 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 tdspan id=msg/span/td /tr /table /body /html DAL.cs using System; using System.Collections.Ge
5、neric; 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 SqlConnect
6、ion 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(
7、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.Rows0password.ToString() != password) return false; catch (Exception) return true; Server.aspx.cs using System; using
8、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 = Requestusername.ToString(); string passwor
9、d = Requestpassword.ToString(); BLL b = new BLL(); if (b.login(username, password) Response.Write(登录胜利); 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+实现用户登陆 三联 以上所述就是本文的全部内容了，盼望大家能够喜爱。 更多信息请查看IT技术专栏 .