ajax无刷新更新数据

ajax.html

<!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>
</head>
<script>
    var xhr;
    function CreateXmlHttp() {
        if (window.ActiveXObject) {
            xhr = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else {
            xhr = new XMLHttpRequest();
        }
    }
    function SendSeq() {
        CreateXmlHttp();
        xhr.open("GET", "Handler.ashx", true);
        xhr.onreadystatechange = function () {
            if (xhr.readyState == 4 && xhr.status == 200) {
                if (xhr.responseText != "") {
                    document.getElementById("Text1").value = xhr.responseText;
                }
            }
        }
        xhr.send(null);
     }
     window.onload = function () {
         var id = setInterval("SendSeq()", 1000);
     }
</script>
<body>
    <form id="form1" runat="server">
    <div>
        <input id="Text1" type="text" />
    
    </div>
    </form>
</body>
</html>

　　Handler.ashx

<%@ WebHandler Language="C#" Class="Handler" %>
using System;
using System.Web;
public class Handler : IHttpHandler
{
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/html";
        context.Response.Write("10");
        context.Response.Cache.SetNoStore();//设置无缓存
    }
    public bool IsReusable {
        get {
            return false;
        }
    }
}

posted on 2012-09-18 22:32 咆哮的蛋蛋阅读(407) 评论(0) 收藏举报