先引入几个图片：
母版页的.aspx代码如下：
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="A_TEST.master.cs" Inherits="A_TEST" %><!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></title><style type="text/css">#div_head{ text-align:center; background-color:Gray; height:60px;}#div_body{ width:750px;background-color:Green;}#div_left{ float:left; width:700px;background-color:Orange; height:500px;}#div_right{ float:right; width:200px; height:500px; background-color:Orange; }.clr{ clear:both;}#div_foot { height:50px; background-color:Olive;}</style><asp:ContentPlaceHolder id="head" runat="server"></asp:ContentPlaceHolder>
</head>
<body><form id="form1" runat="server"><div><div id="div_head"><h1>母版页实例</h1></div>
<div id="div_main">
<div id="div_left">
<asp:ContentPlaceHolder id="holder_main" runat="server"></asp:ContentPlaceHolder>
</div>
<div id="div_right"></div>
<div class="clr"></div>
</div><div id="div_foot"></div></div></form>
</body>
</html>
默认页的.aspx代码如下：
<%@ Page Title="" Language="C#" MasterPageFile="~/A_TEST.master" AutoEventWireup="true" CodeFile="母版页练习.aspx.cs" Inherits="母版页练习" %><asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="holder_main" Runat="Server">
</asp:Content>
显示效果如图所示：
