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Problem exposing master page properties...

Posted on 2006-07-24
Last Modified: 2012-06-27
my brain doesn't seem to be awake yet...(I'm hoping it'll wake up around wednesday or so)....but
I'm using vs2005, web application project, this is a project migrated from 1.1 up to 2.0...and I can't seem to access properties of the master page from a content page....

on the master page:
    Dim m_intCategory As Integer = 1
    Public Property TheCategoryID() As Integer
            Return m_intCategory
        End Get
        Set(ByVal value As Integer)
            m_intCategory = value
        End Set
    End Property

on the aspx of a content page:
<%@ Page Language="vb" AutoEventWireup="false" MasterPageFile="defaultMaster.Master" CodeBehind="testNewMaster.aspx.vb" Inherits="Webvantage.testNewMaster"
    title="" %>
    <%@ MasterType VirtualPath="defaultMaster.Master" %>

in the codebehind, no intellisense for the property and so this fails:
Page.Master.TheCategoryID = 2

I know it is because somehow the content page is not referencing the master page at all....but I thought the directives:

<%@ Page Language="vb" AutoEventWireup="false" MasterPageFile="defaultMaster.Master" CodeBehind="testNewMaster.aspx.vb" Inherits="Webvantage.testNewMaster"
    title="" %>
    <%@ MasterType VirtualPath="defaultMaster.Master" %>

That those 2 lines are what wires up and references the correct master page?
Only it doesn't seem to be doing it.

Err is of course:
'TheCategoryID' is not a member of 'System.web.UI.MasterPage'.

I've tried setting the master from the cbh file first like:
        Page.MasterPageFile = "defaultMaster.Master"
        Page.Master.TheCategoryID = 2

...still not finding it

I don't really want to use FindControl to get to stuff on the master page...what am I missing?


Question by:samtran0331
LVL 33

Accepted Solution

raterus earned 500 total points
ID: 17167366
This "problem" has to do with the new code-compilation model of asp.net 2.0, where your masterpage isn't compiled until the application is started up.  Only way I've found to get by this is to have your MasterPage inherit from a base class in your app_code folder.  Then you put your properties for the masterpage in the base class.  

Expert Comment

ID: 17167461
i never put Page.Master....only Master  so...

Master.TheCategoryID =

then i get the intellisence......

Mind you this is in C#, not sure if that makes a difference??

LVL 37

Author Comment

ID: 17167503
...thanks Michael...I had found a few posts saying the same thing off of Rick Strahl's blog...it wasn't the exact same issue...but his technique was something I thought might work...

...so I shouldn't have any problems if I create a base class for the master page that inherits ...UI.MasterPage
as well as making my content pages use a base class that inherits ...UI.Page

would you recommend I move the stuff in the base class for the content pages into the base class of the master?
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LVL 37

Author Comment

ID: 17167533
Steve, are you using the default "web site project" or the "web application project" template?
LVL 33

Expert Comment

ID: 17167793
naa I wouldn't recommend copying page methods to the masterpage, I try to keep the base page of my masterpages as simple as possible and just have properties there related only to the layout of the page, not what the page is doing.
LVL 37

Author Comment

ID: 17183598
...see i told you my brain would wake up by Wednesday!

using a base class for the master worked like a charm....thanks for the tidbit on when the master gets compiled!

Expert Comment

by:Edward Joell
ID: 20834037
raterus, based on you answer are you saying that the application will not properly complete a build due to this issue unless yiou create a base class for the Master Page to inherit?

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