代码示例：使用AJAX.NET TIMER控件

示例ASPX页面代码：

 

<% ... @ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AJAXTIMESIMPLE._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 > Untitled Page </ title >
</ head >
< body >
     < form  id ="form1"  runat ="server" >
         < asp:ScriptManager  ID ="ScriptManager1"  runat ="server"   />
     < div >
         < asp:UpdatePanel  ID ="UpdatePanel1"  runat ="server" >
             < ContentTemplate >
                 < asp:Timer  ID ="Timer1"  runat ="server"  Interval ="10000"  OnTick ="Timer1_Tick" >
                 </ asp:Timer >
                 < asp:Label  ID ="lblRefresh"  runat ="server"  Text ="Panel not refreshed yet"  Width ="174px" ></ asp:Label >
             </ ContentTemplate >
         </ asp:UpdatePanel >
         < asp:Label  ID ="lblNoFresh"  runat ="server" ></ asp:Label ></ div >
     </ form >
</ body >
</ html >

 示例后台C#代码：

 

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

namespace  AJAXTIMESIMPLE
... {
    public partial class _Default : System.Web.UI.Page
    ...{
        protected void Page_Load(object sender, EventArgs e)
        ...{
            lblNoFresh.Text = "Page created at: " + DateTime.Now.ToLongTimeString();
        }

        protected void Timer1_Tick(object sender, EventArgs e)
        ...{
            lblRefresh.Text = "Panel refreshed at: " + DateTime.Now.ToLongTimeString();
        }
    }
}