WPF-Prism CanExecute method not being called

Question

I am coding a simple login UserControl with two TextBoxes (Username and Password) and a Login button. I want the Login button to be enabled only when the username and password f

Answer 1

It is most likely that the bound control is never asking for the CanExecute state again. You need to call the RaiseCanExecuteChanged method on the DelegateCommand whenever you detect a condition that changes the command's CanExecute state. This signals the bound control to update the CanExecute state.