Ajax异步刷新跟.net后台进行交互-AJAX教程-爱易网页

Ajax异步刷新跟.net后台进行交互

日期：2014-05-16　浏览次数：20670 次

Ajax异步刷新和.net后台进行交互

前台代码
<html>
<head>
    <title>页面交互</title>
    <script type="text/javascript">
        function loadXMLDoc() {
            var xmlhttp;

            var txtQuery = document.getElementById("txtQuery").value;
           
            //XMLHttpRequest 用于在后台与服务器交换数据
            if (window.XMLHttpRequest) {
                xmlhttp = new XMLHttpRequest();
            }
            else {
                xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            //判断是否成功的状态
            xmlhttp.onreadystatechange = function() {
                //
                if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                    var data = xmlhttp.responseText;
                    var Content = "";
                    Content = "<select id='dllUserInfo'>";
                    var arr = new Array;
                    arr = data.split("<br/>");
                    for (var i = 0; i < arr.length; i++) {
                        Content += "<option>" + arr[i] + "<option>";
                    }
                    Content += "<select>"
                    document.getElementById("myDiv").innerHTML = Content;
                }

            }
            //规定请求的类型，url及其是否异步处理
            xmlhttp.open("GET", "/Test.aspx?UserId="+txtQuery+"", true);
            //发送请求
            xmlhttp.send();
        }
    </script>

</head>
<body>
    <h2>
        AJAX</h2>
        用户名：
        <input id="txtQuery" type="text" style=" border-bottom-color:Green" />
        <input  type="button" onclick="loadXMLDoc()" id="btn_Select" value="查询" style="background-color:Red; border:opx; border-color:Blue"/>
    <div id="myDiv">
    </div>
</body>
</html>

后台代码:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using Model;
using BLL;
using System.Collections.Generic;

namespace AjaxTest
{
    public partial class Test : System.Web.UI.Page
    {
        BLL.UserInfo us = new BLL.UserInfo();
        Model.UserInfo u = new Model.UserInfo();
        private string strContent = "";
        protected void Page_Load(object sender, EventArgs e)
        {
            //用户ID
            string strUserId = Request.QueryString["USERID"].ToString();
            Response.Write(getUserInfo(strUserId));
        }

        /// <summary>
        /// 获取用户信息
        /// </summary>
        /// <returns></returns>
        public string getUserInfo(string strUserId)
        {
            List<Model.UserInfo> un = us.getUserInfo(strUserId);
            strContent = "";
            foreach(var i in un)
            {
                strContent += i.UserId + "<br/>" + i.UserCode + "<br/>" + i.UserName + "<br/>" + i.Content + "<br/>";
                //strContent += "<tr><td>" + i.UserId + "</td><td>" + i.UserCode + "</td><td>" + i.UserCode + "</td><td>" + i.Content + "</td></tr>";
            }
           
            return strContent;
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DAL;

namespace BLL
{
     public   class UserInfo
    {
        DAL.getUserinfo gs = new DAL.getUserinfo();

        //获取用户信息
        public List<Model.UserInfo> getUserInfo(string strUserId)
        {
            return gs.getUserInfo( strUserId);
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using Model;
using Utility;
using System.Data;

namespa

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Ajax异步刷新跟.net后台进行交互

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