Last week when building a Windows 8 application I couldn’t get it working for a combobox containing a list of buttons. I wanted to execute some code once a button inside the combobox was clicked.
But it didn’t work as expected. The problem was related to the fact that a ComboBox uses a FlyOut for it’s rendering which its not part of the Visual Tree. So Caliburn.Micro wasn’t able to walk the visual tree and detect the ViewModel instance that was bound to the View through the DataContext. Instead I had to give Caliburn.Micro an extra hint by using Action.TargetWithoutContext;