CommandBinding not set CanExecute will disable button.

Question

If I create the CommandBinding with no CanExecute:

CommandManager.RegisterClassCommandBinding(typeof(MyClass), new CommandBinding(MyCommand, MyCommandExecuted));

And set the command to a button:

<Button Content="Click Me!" Command="{x:Static local:MyClass.MyCommand}"/>

Than the button will always disabled.

What's wrong with it?

Must I set the CanExecute to enabled button?

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Oh well.. that's my mistake.
Look at my answer.

Answer 1

Well, the way I use RegisterClassCommandBinding is incorrect...

The right way to use it is:

CommandManager.RegisterClassCommandBinding(typeof(Button), new CommandBinding(MyCommand, MyCommandExecuted));

The first argument of RegisterClassCommandBinding is the target command source type, not the current class type...

If want to use this command in places other than buttons, use typeof(FrameworkElement).

But typeof(ICommandSource) is not work.