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function getServerTime()
{
      $.ajax({
       type: "POST",
       url: "Default2.aspx",
       data: "name=John&location=Boston",
       success: function(msg){
         $("#txtserver").text(msg);
       }
    });
    setTimeout('getServerTime()',500);
}
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function getServerTime()
{
    $.get("Default2.aspx?1",function(msg){
         $("#txtserver").text(msg);});
    setTimeout('getServerTime()',500);
}
ºǫ́Default2.aspx
 protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write(DateTime.Now.ToLongTimeString());
    }


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ASP.NET AJAX µÄ UpdatePanel ¿Ø¼þ²»ÊÇÍòÄܵÄ

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<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="WebUserControl" %>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode=Conditional>
<ContentTemplate>
<%=DateTime.Now %>
</ContentTemplate>
</asp:UpdatePanel> ......

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Secu ......

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<% using (Ajax.BeginForm("AjaxUpdate", 123, new AjaxOptions {
Confirm = "confirm str", LoadingElementId = "idLoading", UpdateTargetId
= "textEntered", OnSuccess = "validateForm" },new{id="idMyForm"}))
  &nbs ......
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