WPF change bound command for keybindings based on property?

Question

I have a xaml window that I want to bind the Escape key to different commands in my view model depending on the value of a boolean property.

IsSearching == true, bind to a CancelSearch command

IsSearching == false, bind to a Close command.

Is there a way to do this without a code behind?

Answer 1

<Window>
 <Window.InputBindings>
     <KeyBinding Command="{Binding SomeCommand}" Key="F5"/>
 </Window.InputBindings>
</Window>

This is a workaround

private ICommand someCommand;
public ICommand SomeCommand
{
    get
    {
        return someCommand 
            ?? (someCommand = new ActionCommand(() =>
            {

                if(IsSearching)
                   OnCancelExecute();
                else
                   OnCloseExecute();
            }));
    }
}