条件键绑定

Question

I was wandering if someone could explain to me how I could do a conditional key binding (using an MVVM pattern), at the moment I have

 <Window.InputBindings>
    <KeyBinding Command="{Binding Path=CMD_Login}" Gesture="Enter" />
</Window.InputBindings>

but I would like this key-binding to only be active if the user is logging in. They login window is set to visible/collapse depending if the user is logging in or not, so was wandering if the conditional can possibly be based on that?
Thank You

Answer 1

如果您有命令，那么CanExecute部分不应该通过不总是返回true来处理该命令吗？