WPF MVVM应用程序中的键盘事件？

    <KeyBinding Command="{Binding KeyboardCommand}"
                 Key="Enter" />
</Window.InputBindings>

public ICommand KeyboardCommand { get; private set; }

public MyViewModel()
{
    KeyboardCommand = new RelayCommand(OnKeyboardCommand);
}

private void OnKeyboardCommand()
{
    // 处理键盘事件
}

private void OnKeyboardCommand()
{
    // 处理键盘事件
    MessageBox.Show("键盘事件已触发");
}