[RESOLVED] Changing image during page init

[drpcken]

Using Visual Studio 2005 and ASP.NET 2.0
I have some images in my masterpage. Their source may change depending on a parameter in the URL. But I'm not sure whether to code this functionality during the pre-init of the masterpage, or the content page. Is the pre-init even the right time to change image sources?

[mendhak]

The pre-init SHOULD be right. I am assuming you will be creating a property in the master page's class, which you will then be assigning a value to from your content pages. Once the value has been assigned, preinit should be able to pickup this value and assign it to the image. If it is unable to look at this value, then do it in the load

[drpcken]

Hey thanks for the reply. But I'm not quite sure how to create a property in the master page. Can you point me to a tutorial? I'm gonna search for it myself as well.

Thanks!!!

[drpcken]

Ok I created my property in my master page like so:

Public Property Language() As String
        Get
            Return mLanguage
        End Get
        Set(ByVal value As String)
            mLanguage = value
        End Set
    End Property

I tried creating a new instance of the property to an object but I can't get it to work. This property will be set via a parameter in the URL. Any help would be appreciated.

Thanks!

[drpcken]

Ok I'm starting to get the hang of this
But if I'm using my contentpage to send the property value during the PreInit, which page event of the MasterPage do I handle the property reading and handling?

[drpcken]

Ok here is my code from my MasterPage so far:

Partial Class Header
    Inherits System.Web.UI.MasterPage
 
    Private mLanguage As String
    Private mDirective As String
 
    Public Property Directive() As String
        Get
            Return mDirective
        End Get
        Set(ByVal value As String)
            mDirective = value
        End Set
    End Property
 
    Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
        Select Case Me.Directive
            Case "Products"
                Products.ImageUrl = "images/new_header/Menu_Items/Products_On.jpg"
            Case "About"
                About.ImageUrl = "images/new_header/Menu_Items/AboutUs_On.jpg"
            Case "Search"
                Search.ImageUrl = "images/new_header/Menu_Items/Search_On.jpg"
            Case "Employment"
                Employment.ImageUrl = "images/new_header/Menu_Items/Employment_On.jpg"
            Case "Contact"
                Contact.ImageUrl = "images/new_header/Menu_Items/Contact_On.jpg"
        End Select
 
    End Sub
End Class

When my contentpage PreInit event fires, I would like it to change the Directive property of the MasterPage, but I'm not sure how to expose it from the contentpage.

[drpcken]

Yay! I figured it out myself

In my content page I added this:

Protected Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit
 
        CType(Master, Header).Directive = Request.QueryString("Directive")
 
    End Sub