 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CheckBoxList.aspx.cs" Inherits="CheckBoxList" %> 
<!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>獲得CheckBoxList選中的數(shù)量(jQuery與Javascript對照學習/前臺與后臺)</title> 
<script type="text/javascript" src="js/jquery-1.3.2.min.js"></script> 
<script type="text/javascript"> 
//jQuery的方法(王君) 
$(function(){ 
$("#chkBox").click(function(){ 
alert($("#chkBox input[@type=checkbox]:checked").size()); 
}); 
}); 
//javacript方法(候林) 
function f(){ 
var a=document.getElementsByTagName('input') 
var num=0; 
for(var i=0;i<a.length;i++){ 
if(a[i].type=='checkbox'){ 
if(a[i].checked==true) 
num+=1; 
} 
} 
alert(num); 
} 
</script> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> 
jQuery的選擇器真的好強大，好靈活。<br /> 
javascript的原始方法也值得研究。 
</div> 
<div> 
<input type="button" value="Javascript取值" onclick="f();" /> 
<asp:CheckBoxList ID="chkBox" runat="server"> 
<asp:ListItem>1</asp:ListItem> 
<asp:ListItem>2</asp:ListItem> 
<asp:ListItem>3</asp:ListItem> 
</asp:CheckBoxList> 
<asp:Button ID="btnOk" runat="server" OnClick="btnOk_Click" Text="服務器端取" /> 
</div> 
</form> 
</body> 
</html> 

復制代碼代碼如下:

 
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; 
public partial class CheckBoxList : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
} 
protected void btnOk_Click(object sender, EventArgs e) 
{ 
int totalNum = 0;//總數(shù) 
string list = "000";//選中的值 
for (int i = 0; i < this.chkBox.Items.Count; i++) 
{ 
if (chkBox.Items[i].Selected) 
{ 
totalNum += 1; 
list += "," + chkBox.Items[i].Value; 
} 
} 
Response.Write(totalNum.ToString() + "|" + list); 
} 
} 