WPF Custom ICommand implementation and the CanExecuteChanged event

Question

in my WPF UI, I use RoutedCommands that I refer to in my xaml via the following code:

Command=\"viewModel:MessageListViewModel.DeleteMessagesCommand\"
         


        

Answer 1

I very much prefer the DelegateCommand implementation of Prism for viewmodel binding (http://msdn.microsoft.com/en-us/library/ff654132.aspx). You can invoke CanExecute() on every command invoker by calling RaiseCanExecuteChanged on it.

Simple usage example:

public class ViewModel
{
   public ViewModel()
   {
      Command = new DelegateCommand