 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Services; 
using System.Data.SqlClient; //引入命名空間 
using System.Data; 

namespace 加載層 
{ 
/// <summary> 
/// $codebehindclassname$ 的摘要說明 
/// </summary> 
[WebService(Namespace = "http://tempuri.org/")] 
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] 
public class ReadData : IHttpHandler 
{ 

public void ProcessRequest(HttpContext context) 
{ 
//context.Response.ContentType = "text/plain"; 
//context.Response.Write("Hello World"); 

//獲取外部傳進來的變量值i 
int i = Int32.Parse(context.Request.QueryString["i"]); 

//連接數(shù)據(jù)庫 

SqlConnection con = new SqlConnection("data source=.;user id=sa;pwd=5239898;database=librarydatabase;"); 
con.Open(); 
SqlDataAdapter ada = new SqlDataAdapter("select * from reader where 序號='" + i + "'", con); 
SqlCommandBuilder com = new SqlCommandBuilder(ada); 
DataSet ds = new DataSet(); 
ada.Fill(ds, "reader"); 

con.Close(); 

//讀取表中欄位為“姓名”的字段值，并傳出 

context.Response.Write(ds.Tables["reader"].Rows[0]["姓名"].ToString()); 


} 

public bool IsReusable 
{ 
get 
{ 
return false; 
} 
} 
} 
} 

然后我們需要新建一個JavaScript文件，命名為loaddata.js。輸入如下代碼：

復(fù)制代碼代碼如下:

 

/*當(dāng)DOM加載完畢之后就自動為兩個鏈接添加Click事件*/ 
$("document").ready(function() { 
$("a[href=javascript]").click(function() { 
chkform(); 
return false; 
}) 
$("a[href=test]").click(function() { 
$("#load").css("display", "none"); 
$("#mark").css("display", "none"); 
return false; 
}) 
}); 


var chkform = function() { 
new Request({ 

/*調(diào)用一般處理程序進行后臺抓取數(shù)據(jù)并返回txt變量*/ 
url: 'ReadData.ashx?i=' + $("#Text1").attr("value"), 

/*抓取數(shù)據(jù)成功之后*/ 
onSuccess: function(txt) { 
$("#load").append("<P>" + txt + "</P>"); 

$("#load").css("display", "block"); 
$("#mark").css("display", "block"); 
}, 

/*正在抓取*/ 
onRequest: function() { 

$("#load").append("<P>正在加載</P>"); 
}, 

/*數(shù)據(jù)加載失敗*/ 
onFailure: function() { 
alert('信息加載失??！'); 

} 
}).send(); 
} 

還沒完，我們還要新增一個CSS文件，命名為main.css，深入如下樣式：

復(fù)制代碼代碼如下:

 
#mark{ 
width: 100%; 
background-color:White; 
position:absolute; 
left: 0px; 
top: 0px; 
height: 700px; 
filter:alpha(opacity=70); 
-moz-opacity:70; 
opacity:70; 
z-index:2; 
display:none; 
} 
#load 
{ 
background-color:Gray; 
border: 1px solid #999; 
font-size: 12px; 
position:relative; 
margin:0 auto; 
margin-top:100px; 
width:200px; 
height:150px; 
z-index:99; 
display:none; 
} 

我們在網(wǎng)站的首頁里面源碼輸入如下代碼：

復(fù)制代碼代碼如下:

 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="加載層._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>加載層</title> 
<link type="text/css" href="main.css" rel="Stylesheet" /> 

<script type="text/javascript" src="mootools.js"></script> //記得引入這個javascript庫文件 

<script type="text/javascript" src="jquery-1.3.1-vsdoc.js"></script> //VS支持智能提示的文件，可有可無 

<script type="text/javascript" src="jquery-1.3.1.js"></script> //記得引入JQuery 

<script type="text/javascript" src="loaddata.js"></script> 

</head> 
<body> 
<div id="me"> 
<a href="javascript">點擊加載</a> 
<input id="Text1" type="text" /></div> 
<div id="load"> 
load <a href="test">試試</a> 
</div> 
<div id="mark"> 
</div> 
</body> 
</html> 