Context Menu in OOB

[Lee]

Hi, 

I'm trying to create a Context Menu in OOB. I am using version 2012.3.1224.1050. I have been able to create the Context Menu in browser but when I'm in OOB, I'm getting an error, 'Reference is not a valid visual DependencyObject.' when I'm trying to set the Context Menu IsOpen property to True. I'm using the Context Menu in a child window. Can you please explain what I'm doing wrong?

Example:
Dim oContextMenu As New Telerik.Windows.Controls.RadContextMenu
Dim lstMenuItem As New ObservableCollection(Of Telerik.Windows.Controls.RadMenuItem)

 'Add Comment
 oMenuItem = AddCommentToContextMenu()

 'Display Context Menu
  With oContextMenu
                .ItemsSource = lstMenuItem
                .IsOpen = True
                .HorizontalOffset = oCurrentMousePosition.X
                .VerticalOffset = oCurrentMousePosition.Y
            End With

[Rosen Vladimirov]

Hello Lee,

In your code RadContextMenu is not set to any visual object, that's why you are receiving an exception. You have to use the code below to set it:

RadContextMenu.SetContextMenu(Me.LayoutRoot, oContextMenu)
   With oContextMenu
                 .ItemsSource = lstMenuItem
                 .IsOpen = True
                 .HorizontalOffset = oCurrentMousePosition.X
                 .VerticalOffset = oCurrentMousePosition.Y
             End With

Hopefully this helps!

Kind regards,
Rosen Vladimirov
the Telerik team