the function
private void SetUpMasterPage(){
this.MasterPageFile = "~/MasterPages/NestedMasterPageTest2.Master";
}
is called on the OnPreInit... This works when the masterpagefile is the base masterpage... But how are we going to make it work for the nested masterpage?
we actually tried
this.Master.MasterPageFile = "~/MasterPages/Base.Master";
but it throws an exception... =(
So, to make things clearer, on the aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Test._Default"%>
<asp:Content ID="testContent" ContentPlaceHolderID="body" runat="server">
This is a test!
</asp:Content>
on the base.Master
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Base.master.cs" Inherits="Test.Base" %>
<!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>The title</title>
<asp:ContentPlaceHolder ID="head" runat="server"></asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ContentPlaceHolder ID="body" runat="server">
</asp:ContentPlaceHolder>
</div>
</form>
</body>
</html>
and on the default.aspx.cs
protected override void OnPreInit(EventArgs e){
this.MasterPageFile = "~/MasterPages/Base.Master";
}
it is working...
but when I use a nested master page
<%@ Master Language="C#" MasterPageFile="~/MasterPages/Base.Master" AutoEventWireup="true" CodeBehind="NestedMasterPageTest2.master.cs" Inherits="Test.MasterPages.NestedMasterPageTest2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="body" runat="server">
</asp:Content>
then changed the default.aspx.cs
protected override void OnPreInit(EventArgs e){
this.MasterPageFile ="~/MasterPages/NestedMasterPageTest2.Master";
}
and I changed the default.aspx
<asp:Content ID="testContent" ContentPlaceHolderID="Content2" runat="server">
This is a test which uses a nested master page!
</asp:Content>
it returns an error that says Cannot find ContentPlaceHolder 'Content2' in the master page '/MasterPages/NestedMasterPageTest2.Master', verify content control's ContentPlaceHolderID attribute in the content page. But Content2 is on NestedMasterPageTest2. What really must have happened here?