<html xmlns="<head runat="server">
<title>無(wú)標(biāo)題頁(yè)</title>
<!-- 兩個(gè)js腳本文件-->
<script type="text/javascript" src="SqlHelp/jquery-1.3.2.js"></script>
<script type="text/javascript" src="SqlHelp/GetMessageCount.js"></script>
</head>
<body>
<form id="form1" runat="server">
<div style="border-color:Green; border-style:solid; margin-top:100px; margin-left:300px; width:300px; height:50px; text-align:center;">
您有<input type="text" value="0" id="messageCount"/><a href="ShowMessage.aspx">條短消息</a>
</div>
</form>
</body>
</html>
js代碼：這里用到了Jquery框架，不再贅述，網(wǎng)上有很多的資料。
GetMessageCount.js
//------GetMessageCount.js Begin----------------------
if(!GetMessageCount){
var GetMessageCount = {};
}
$(document).ready(
function(){
GetMessageCount.FindMessage();
}
);
GetMessageCount.FindMessage = function(){
$.ajax({
//處理ajax請(qǐng)求
,
// 當(dāng)前用戶的ID，這里圖省事就省略了，直接寫(xiě)死為 1，
//實(shí)際使用過(guò)程中可以從session中獲取 。。。。
data:{Uid:1},
cache: false,
//回調(diào)函數(shù)返回未讀短信數(shù)目
success: function(response)
{
$('#messageCount').val(response);
},
error:function(data)
{
alert("加載失敗");
}
});
//每隔5 秒遞歸調(diào)用一次，刷新未讀短信數(shù)目
window.setTimeout(GetMessageCount.FindMessage,5000);核心語(yǔ)句
}
//------GetMessageCount.js End----------------------
到了這里，貼出處理ajax請(qǐng)求頁(yè)面的代碼，非常簡(jiǎn)單
FindNewMessage.ashx
//----------------'FindNewMessage.ashx Begin
using System;
using System.Collections;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
namespace MIDemo
{
/// <summary>
/// $codebehindclassname$ 的摘要說(shuō)明
/// </summary>
[WebService(Namespace = " [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class FindNewMessage : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//就這一句代碼，獲取未讀短信的數(shù)量，返回頁(yè)面
//后臺(tái)的sql代碼就省略了
int count = SqlHelp.SqlHelp.GetUnreadMessageCount(Convert.ToInt32(context.Request["Uid"]));
//返回頁(yè)面
context.Response.Write(count);
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
//----------------'FindNewMessage.ashx End
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