asp.net 应用ajax自动刷新时间

页面每过1秒向后台发送一次异步请求,读取服务器上的时间之后response给页面.

前台页面代码:

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

<!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>MyWeb</title>
    <script type="text/javascript" src="js/jquery-1.4.2.min.js"></script>
    <script type="text/javascript">
        $(function(){
            setInterval(function(){
                 $.get("Default.aspx?action=time&timestamp="+new Date().getTime(),function(data){
                    $("#time").html(data);
                });
            },1000);
        })
       
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div id="time">
       
    </div>
    </form>
</body>
</html>

后台代码:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        if (Request.QueryString["action"] == "time")
        {
            Response.Write(DateTime.Now.ToString());
            Response.End();
        }
    }
}

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