通过Ajax实现的一个时钟_now.aspx是服务器反应的当前时间。
Ajax页面：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="<A href="http://www.w3.org/1999/xhtml">http://www.w3.org/1999/xhtml">
<head>
<title>Untitled Page</title>
<****** type="text/javascript">
function doing()
{
var xmlHttp;
try
{
xmlHttp = new XMLHttpRequest();
}
catch(e)
{
try
{
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
try
{
xmlHttp = new ActiveXObject ("Microsoft.XMLHTTP");
}
catch(e)
{
alert("您的浏览器不支持Ajax!");
return false;
}
}
}
xmlHttp .onreadystatechange = function ()
{
if (xmlHttp .readyState == 4)
{
var strResult = xmlHttp .responseText;
document .getElementById("now").value = strResult;
}
}
xmlHttp .open("GET","now.aspx",true);
xmlHttp .send(null);
}
function gettingTime()
{
setInterval(doing,1000);
}
</script>
</head>
<body onload ="gettingTime();" >
当前的系统时间：
<input type="text" id="now" >
</body>
</html>
now.aspx页面：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="now.aspx.cs" Inherits="now" %>
now.aspx.cs页面：
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;
public partial class now : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Expires = -1;
Response.Write(DateTime .Now.ToString());
}
}
