ajax中post和get用法详解

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using BLL;
using Model;
public partial class ajaxlogin : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string result = "-1";
        string uName = Request.Form["un"];
        string uPwd = Request.Form["up"];
        if (!string.IsNullOrEmpty(uName) && !string.IsNullOrEmpty(uPwd))
        {
            BLL.StudentMananger bs = new StudentMananger();
            Model.Students stu = bs.GetSingeByConition(uName, uPwd);
            if (stu != null)
            {
                result ="1";
   
            }
          
                Response.Write(result);
                Response.End();
        
        }
    }
}

 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ajaxlogin.aspx.cs" Inherits="ajaxlogin" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="js/ajax.js" type="text/javascript"></script>
    <script type="text/javascript">
        window.onload = function () {
          //  var xhr = createXmlHttp();
            gel("Button1").onclick = onLogin;
        }
        function onLogin() {
            var xhr = createXmlHttp();
            var getname = gel("txtname").value;
            var getpwd = gel("txtpwd").value;
            var data = "un=" + getname + "&up=" + getpwd;
            xhr.open("POST", "ajaxlogin.aspx", true);
            xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
            xhr.onreadystatechange = function () {
              
                if (xhr.readyState == 4) {
                    if (xhr.status == 200) {
                        var reponseText = xhr.responseText;
                        alert(reponseText);
                        if (reponseText == "1") {
                            alert("登录成功！");
                            window.location = "Default.aspx";
                        } else {
                            alert("登录失败！");
                        }
                    }
                    else {
                        alert("服务器错误！xhr.status=" + xhr.status);
                    }
                }
            }
            xhr.send(data);
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
     <div>
    
        <input id="txtname" type="text" /><input id="txtpwd" type="text" /><input 
            id="Button1" type="button" value="button" /></div>
    </form>

     
</body>
</html>

 

function gel(cid) {
    return document.getElementById(cid);
}

function createXmlHttp() {//创建xhr对象
    var xhobj = false;
    try {
        xhobj = new ActiveXObject("Msxml2.XMLHTTP"); // ie msxml3.0+
    } catch (e) {
        try {
            xhobj = new ActiveXObject("Microsoft.XMLHTTP"); //ie msxml2.6
        } catch (e2) {
            xhobj = false;
        }
    }
    if (!xhobj && typeof XMLHttpRequest != 'undefined') {// Firefox, Opera 8.0+, Safari
        xhobj = new XMLHttpRequest();
    }
    return xhobj;
}

 

posted @ 2012-11-26 18:13  诗意花  阅读(157)  评论(0)    收藏  举报