Capture Esc Key in UserControl

问题

I want to create a Custom Popup using UserControl, because this is UWP apps, I want to hide Popup when user press ESC on Keyboard.

I try to override OnKeyDown method of UserControl but this method never executed when I press ESC on Keyboard.

 protected override void OnKeyDown(KeyRoutedEventArgs e)
 {
    if (e.Key == VirtualKey.Escape)
    {
       this.Visibility = Visibility.Colapse;
    }
 }

回答1:

I want to hide Popup when user press ESC on Keyboard.

In UWP app, consider using CoreWindow.CharacterReceived event

In UserControl, add event handler in the Constructor method:

public CustomPopupControl()
{
            this.InitializeComponent();

            Window.Current.CoreWindow.CharacterReceived += CoreWindow_CharacterReceived;
}

private void CoreWindow_CharacterReceived(CoreWindow sender, CharacterReceivedEventArgs args)
{
            if(args.KeyCode==27) //ESC
            {
        //Do somthing
                this.Visibility = Visibility.Collapsed;
            }
}

来源：https://stackoverflow.com/questions/34371280/capture-esc-key-in-usercontrol