how to use nested master page ?

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i have a master page site1.master and a nested master page nage name nestedmasterpage1.master
when i'm add nested page to a content page get error Cannot find ContentPlaceHolder 'MainContent' in the master page '/NestedMasterPage1.Master'
what me should to do?
plz help

nested master page----------------
<%@ Master Language="VB" MasterPageFile="~/Site1.Master" AutoEventWireup="false" CodeBehind="NestedMasterPage1.master.vb" Inherits="WebApplication2.NestedMasterPage1" %>

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

content page-------------------
<%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/NestedMasterPage1.Master" CodeBehind="report.aspx.vb" Inherits="WebApplication2.report" %>

<%@ Register Assembly="Syncfusion.Grid.Grouping.Web, Version=8.204.0.18, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89"
Namespace="Syncfusion.Web.UI.WebControls.Grid.Grouping" TagPrefix="syncfusion" %>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

Posted 21-Aug-14 1:32am

neeraj_

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3 solutions

Solution 3

Try the below link hope it helps :)
Nested master page asp.net

Posted 21-Aug-14 2:16am

Sanket Saxena

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Gupta Poonam · Accepted Answer · 2014-08-21T01:35:00

Solution 1

Using Nested Master Pages in ASP.NET

You Master page site1.master should have a content place holder with id "MainContent" as you have used it in your NestedMasterPage1.Master

In NestedMasterPage1.Master you can use another content place holder within MainContent Place holder for your content page.

Posted 21-Aug-14 1:35am

Gupta Poonam

Updated 21-Aug-14 1:46am

v3

Comments

neeraj_ 21-Aug-14 7:40am

thanks for your kind response but plz check what's wrong with my code if be possible

Gupta Poonam 21-Aug-14 7:50am

Have improved my answer. Hope it will help you out

MT_ · Accepted Answer · 2014-08-21T01:50:00

You need to put a content placeholder in the nested master page

So effectively, you have a content placeholder in master page say "MainContent" then in your nested master page instead of

C#

<asp:content id="Content2" contentplaceholderid="MainContent" runat="server" xmlns:asp="#unknown"></asp:content>

use

C#

<asp:content id="Content2" contentplaceholderid="MainContent" runat="server" xmlns:asp="#unknown">
 <asp:contentplaceholder id="MainContentNested" runat="server">
            </asp:contentplaceholder>

</asp:content>

Now in your page refer to MainContentNested instead of MainContent.

Hope that helps