Nesting Master Pages : Master page « Development « ASP.NET Tutorial

A single site-wide Master Page that applies to all the content pages. 
Aection-wide Master Pages that apply to only the pages contained in a particular section.

File: Site.master

<%@ 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 id="Head1" runat="server">
    <style type="text/css">
        .content
        {
            margin:auto;
            border-style:solid;
            background-color:white;
            padding:10px;
        }
        .tabstrip
        {
            padding:3px;
            border-top:solid 1px black;
            border-bottom:solid 1px black;
        }
        .tabstrip a
        {
            font:14px Arial;
            color:DarkGreen;
            text-decoration:none;
        }
        .column
        {
            float:left;
            padding:10px;
            border-right:solid 1px black;
        }
        .rightColumn
        {
            float:left;
            padding:10px;
        }
        .clear
        {
            clear:both;
        }
    </style>
    <title>Site Master</title>
</head>
<body>
    <form id="form1" runat="server">

    <div class="content">
        <asp:Image
            id="imgLogo"
            ImageUrl="~/Images/SiteLogo.gif"
            AlternateText="Website Logo"
            Runat="server" />

        <div class="tabstrip">
        <asp:HyperLink
            id="lnkProducts"
            Text="Products"
            NavigateUrl="~/Products.aspx"
            Runat="server" />
        &nbsp;
        <asp:HyperLink
            id="lnkServices"
            Text="Services"
            NavigateUrl="~/Services.aspx"
            Runat="server" />
        </div>
        <asp:contentplaceholder id="ContentPlaceHolder1" runat="server">
        </asp:contentplaceholder>
        <br class="clear" />
        copyright &copy; 2007 by the Company
    </div>
    </form>
</body>
</html>

File: SectionProducts.master

<%@ Master Language="C#" MasterPageFile="~/Site.master" %>

<asp:Content
    id="Content1"
    ContentPlaceHolderID="ContentPlaceHolder1"
    Runat="server">
    <div class="column">
        <asp:ContentPlaceHolder
            id="ContentPlaceHolder1"
            Runat="server" />
    </div>
    <div class="column">
        <asp:ContentPlaceHolder
            id="ContentPlaceHolder2"
            Runat="server" />
    </div>
    <div class="rightColumn">
        <asp:ContentPlaceHolder
            id="ContentPlaceHolder3"
            Runat="server" />
    </div>
</asp:Content>


File: SectionServices.master

<%@ Master Language="C#" MasterPageFile="~/Site.master" %>


<asp:Content
    id="Content1"
    ContentPlaceHolderID="ContentPlaceHolder1"
    Runat="server">
    <div class="column">
        <asp:ContentPlaceHolder
            id="ContentPlaceHolder1"
            Runat="server" />
    </div>
    <div class="rightColumn">
        <asp:ContentPlaceHolder
            id="ContentPlaceHolder2"
            Runat="server" />
    </div>
</asp:Content>


File: Products.aspx

<%@ Page Language="C#" MasterPageFile="~/SectionProducts.master" %>
<asp:Content
    ID="Content1"
    ContentPlaceHolderID="ContentPlaceHolder1"
    Runat="Server">
    Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
</asp:Content>

<asp:Content
    ID="Content2"
    ContentPlaceHolderID="ContentPlaceHolder2"
    Runat="Server">
    Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
</asp:Content>

<asp:Content
    ID="Content3"
    ContentPlaceHolderID="ContentPlaceHolder3"
    Runat="Server">
    Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
    <br />Products, Products, Products
</asp:Content>

File: Services.aspx

<%@ Page Language="C#" MasterPageFile="~/SectionServices.master" Title="Services" %>


<asp:Content
    ID="Content1"
    ContentPlaceHolderID="ContentPlaceHolder1"
    Runat="Server">
    Services, Services, Services
    <br />Services, Services, Services
    <br />Services, Services, Services
    <br />Services, Services, Services
    <br />Services, Services, Services
</asp:Content>
<asp:Content
    ID="Content2"
    ContentPlaceHolderID="ContentPlaceHolder2"
    Runat="Server">
    Services, Services, Services, Services, Services
    <br />Services, Services, Services, Services, Services
    <br />Services, Services, Services, Services, Services
    <br />Services, Services, Services, Services, Services
    <br />Services, Services, Services, Services, Services
</asp:Content>

9.35.Master page
	9.35.1.	What is a Master page
	9.35.2.	How Master Pages and Content Pages Are Connected
	9.35.3.	A Master Page enables you to share the same content among multiple content pages.
	9.35.4.	Dynamically change master page
	9.35.5.	Table layout master page
	9.35.6.	Simplest Master page
	9.35.7.	Multipart master page
	9.35.8.	Master page with default content
	9.35.9.	Change master page in page init event
	9.35.10.	Nesting Master Pages
	9.35.11.	Deal with the relative path between master page and content page
	9.35.12.	Using the Title Attribute
	9.35.13.	Using the Page Header Property
	9.35.14.	Modifies the Master Page tags (the tags used by search engines when indexing a page).
	9.35.15.	Exposing Master Page Properties
	9.35.16.	Modify a control in a Master Page by using the FindControl() method in a content page.
	9.35.17.	Associate different Master Pages dynamically with a content page
	9.35.18.	Loading Master Pages Dynamically for Multiple Content Pages