嵌套的 ASP.NET 母版页
更新：2007 年 11 月
母版页可以嵌套，让一个母版页引用另外的页作为其母版页。利用嵌套的母版页可以创建组件化的母版页。例如，大型站点可能包含一个用于定义站点外观的总体母版页。然后，不同的站点内容合作伙伴又可以定义各自的子母版页，这些子母版页引用站点母版页，并相应定义该合作伙伴的内容的外观。
与任何母版页一样，子母版页也包含文件扩展名 .master。子母版页通常会包含一些内容控件，这些控件将映射到父母版页上的内容占位符。就这方面而言，子母版页的布局方式与所有内容页类似。但是，子母版页还有自已的内容占位符，可用于显示其子页提供的内容。下面的三个页清单演示了一个简单的嵌套母版页配置。
以下为父母版页文件：
<% @ Master Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
<head runat="server">
<title>Untitled Page</title>
</head>
<form id="Form1" runat="server">
<div>
<h1>Parent Master</h1>
<p style="font:color=red">This is parent master content.</p>
<asp:ContentPlaceHolder ID="MainContent" runat="server" />
</div>
</form>
</body>
</html>
<% @ Master Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML
1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="Form1" runat="server">
<div>
<h1>Parent Master</h1>
<p style="font:color=red">This is parent master content.</p>
<asp:ContentPlaceHolder ID="MainContent" runat="server" />
</div>
</form>
</body>
</html>
以下为子母版页文件：
<%@ Master Language="VB" MasterPageFile="~/Parent.master"%>
<asp:Content id="Content1" ContentPlaceholderID="MainContent" runat="server">
<asp:panel runat="server" id="panelMain" backcolor="lightyellow">
<h2>Child master</h2>
<asp:panel runat="server" id="panel1" backcolor="lightblue">
<p>This is childmaster content.</p>
<asp:ContentPlaceHolder ID="ChildContent1" runat="server" />
</asp:panel>
<asp:panel runat="server" id="panel2" backcolor="pink">
<p>This is childmaster content.</p>
<asp:ContentPlaceHolder ID="ChildContent2" runat="server" />
</asp:panel>
<br />
</asp:panel>
</asp:Content>
<%@ Master Language="C#" MasterPageFile="~/Parent.master"%>
<asp:Content id="Content1" ContentPlaceholderID="MainContent" runat="server">
<asp:panel runat="server" id="panelMain" backcolor="lightyellow">
<h2>Child master</h2>
<asp:panel runat="server" id="panel1" backcolor="lightblue">
<p>This is child master content.</p>
<asp:ContentPlaceHolder ID="ChildContent1" runat="server" />
</asp:panel>
<asp:panel runat="server" id="panel2" backcolor="pink">
<p>This is child master content.</p>
<asp:ContentPlaceHolder ID="ChildContent2" runat="server" />
</asp:panel>
<br />
</asp:panel>
</asp:Content>
以下为引用子母版页的子文件：
<%@ Page Language="VB" MasterPageFile="~/Child.master"%>
<asp:Content id="Content1" ContentPlaceholderID="ChildContent1" runat="server">
<asp:Label runat="server" id="Label1"
text="Child label1" font-bold="true" />
<br>
</asp:Content>
<asp:Content id="Content2" ContentPlaceholderID="ChildContent2" runat="server">
<asp:Label runat="server" id="Label2"
text="Child label2" font-bold="true"/>
</asp:Content>
<%@ Page Language="C#" MasterPageFile="~/Child.master"%>
<asp:Content id="Content1" ContentPlaceholderID="ChildContent1" runat="server">
<asp:Label runat="server" id="Label1"
text="Child label1" font-bold="true" />
<br />
</asp:Content>
<asp:Content id="Content2" ContentPlaceholderID="ChildContent2" runat="server">
<asp:Label runat="server" id="Label2"
text="Child label2" font-bold="true"/>
</asp:Content>