1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %> 2 3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 4 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <title></title> 8 <script src="Scripts/common.js" type="text/javascript"></script> 9 <script type="text/javascript"> 10 var xhr; 11 window.onload = function () { 12 xhr = createXmlHttp(); 13 gel("btnL").onclick = loginByAjax; 14 } 15 function loginByAjax() { 16 var uName = gel("txtUName").value; 17 var uPwd = gel("txtPwd").value; 18 var urlStr = "DoLogin.ashx";///??????指定接收数据的页面 19 //发送到后台数据的格式 20 var data = "un=" + uName + "&up=" + uPwd; 21 xhr.open("POST", urlStr, true); 22 xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 23 xhr.onreadystatechange = function () { 24 gel("msgDiv").innerHTML = "登录中......"; 25 if (xhr.readyState == 4) { 26 if (xhr.status == 200) { 27 var reponseText = xhr.responseText; 28 if (reponseText == "1") { 29 alert("登录成功！"); 30 window.location = "Default.aspx"; 31 } else { 32 alert("登录失败！"); 33 } 34 } 35 else { 36 alert("服务器错误！xhr.status=" + xhr.status); 37 } 38 } 39 } 40 //发送数据 41 xhr.send(data); 42 } 43 </script> 44 </head> 45 <body> 46 <center> 47 <form id="form1" runat="server" action ="DoLogin.ashx"> 48 <div> 49 <input type="text" id="txtUName" name="txtUName" /> 50 <input type="password" name ="txtPwd" id="txtPwd"/> 51 <input type="button" id="btnL" value="登录" /> 52 </div> 53 <div id="msgDiv"></div> 54 </form> 55 </center> 56 </body> 57 </html>
后台页面DoLogin.ashx
1 <%@ WebHandler Language="C#" Class="DoLogin" %> 2 3 using System; 4 using System.Web; 5 6 public class DoLogin : IHttpHandler { 7 string uName; 8 string uPwd; 9 public void ProcessRequest (HttpContext context) { 10 11 uName = context.Request.Form["un"];//注意这里获取的是send发送过来的数据 12 uPwd = context.Request.Form["up"]; 13 if ((uName == "yaoxinchao") &&( uPwd == "123456")) 14 { 15 System.Threading.Thread.Sleep(3000); 16 context.Response.Write("1"); 17 } 18 } 19 20 public bool IsReusable { 21 get { 22 return false; 23 } 24 } 25 26 }