<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication18.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Asp. Server Push</title>
<script src="jquery-1.8.1.min.js"></script>
<script type="text/javascript">
function Change(str) {
window.document.getElementById("div1").innerText = str;
}
</script>
<script type="text/javascript">
$(function () {
var iframe = document.createElement("iframe");
iframe.width = 0;
iframe.height = 0;
iframe.src = 'Default.aspx';
$("#ceshi").html(iframe);
});
</script>
</head>
<body>
<div id="ceshi" style="display:none"></div>
<div style=" float:left">现在时间是：</div>
<div id="div1"></div>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication18
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected override void Render(HtmlTextWriter output)
{
string str;
while (true)
{//死循环保持长链接
str = "<script >window.parent.Change('" + DateTime.Now.ToLongTimeString() + "')</script>";
HttpContext.Current. Response.Write(str);
HttpContext.Current.Response.Flush();//输脚本调用出
}
}
}
}