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I'm, using MVC to develop a Web application, and I need to use nested MasterPages in my site, in order to share the Visual Components.
I have two Master Pages and a ContentPage:
I want to reference a ContentPlaceHolder placed on the top Parent.master from the Content view that has Child.master as MasterPage. It seems that I can use the ContentPlaceHolders from the direct parent, but not from the indirect parent. Let's see with a sample:
Parent.master
<%@ Master Language="C#"
Inherits="System.Web.Mvc.ViewMasterPage"%>
<HTML>
<head runat="server">
<title>
<asp:contentplaceholder id="Title" runat="server" />
</title>
</head>
<body>
<asp:contentplaceholder id="Body" runat="server" />
</body>
<HTML>
Child.Master
<%@ Master Language="C#" MasterPageFile="~/Views/Shared/Parent.master"
Inherits="System.Web.Mvc.ViewMasterPage"%>
<asp:Content ID="BodyContent" ContentPlaceHolderID="Body" runat="server">
<asp:contentplaceholder id="Body1" runat="server" />
<asp:contentplaceholder id="Body2" runat="server" />
</asp:Content>
Content.aspx
<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Child.master"
Inherits="System.Web.Mvc.ViewPage" %>
<asp:Content ID="TitleContent" ContentPlaceHolderID="Title" runat="server">
<!-- Placed to the top parent Master page (does not work) -->
The page title
</asp:Content>
<asp:Content ID="Body1Content" ContentPlaceHolderID="Body1" runat="server">
<!-- Placed in the direct parent Master page (Works) -->
Body content 1
</asp:Content>
<asp:Content ID="Body2Content ContentPlaceHolderID="Body2" runat="server">
<!-- Placed in the direct parent Master page (Works) -->
Body content 2
</asp:Content>
The result is that I can see Body content 1 and Body content 2 in my page, but not the page title.
691
Master pages can be nested, with one master page referencing another as its master. Nested master pages allow you to create componentized master pages. For example, a large site might contain an overall master page that defines the look of the site.
You add a new view master page to an MVC project by right-clicking the Views\Shared folder, selecting the menu option Add, New Item, and selecting the MVC View Master Page template (see Figure 1).
A key difference between page layouts and master pages is that page layouts can be used for any of the print-based outputs (Adobe FrameMaker, Adobe PDF, Microsoft Word, Microsoft XPS, XHTML), whereas master pages can be used only for Microsoft Word and FrameMaker when creating print-based output.
The master page establishes a layout and includes one or more ContentPlaceHolder controls for replaceable text and controls. The content page includes only the text and controls that are merged at run time with the master page's ContentPlaceHolder controls.
The content place holder will only refer to the content placeholders in its immediate parent. Change your Child.master this this:
<%@ Master Language="C#" MasterPageFile="~/Views/Shared/Parent.master" Inherits="System.Web.Mvc.ViewMasterPage"%>
<asp:Content ID="BodyContent" ContentPlaceHolderID="Body" runat="server">
<asp:Content ContentPlaceHolderID="Title" runat="server">
<asp:contentplaceholder id="TitleContent" runat="server" />
</asp:Content>
<asp:contentplaceholder id="Body1" runat="server" />
<asp:contentplaceholder id="Body2" runat="server" />
</asp:Content>
So the Child.master essentially acts like a "pass-through" for the Title content placeholder.
102
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