WPF custom command in context menu are disabled until any button clicked

Question

I have a custom command and I try to execute them from the context menu, but they are always displayed as disabled unless I click any button on the UI (buttons do not have a

Answer 1

Completely different track, now: there is indeed something special about the ContextMenu as the carrier for commands: the menu is not regarded as part of the window and therefore does not behave like an element in its visual tree would.

There are different solutions for your problems defined here: http://www.wpftutorial.net/RoutedCommandsInContextMenu.html

The easiest approach seems to be adding this to your XAML (for the window):

FocusManager.FocusedElement="{Binding RelativeSource={x:Static RelativeSource.Self}, Mode=OneTime}"