Detect if Modifier Key is Pressed in KeyRoutedEventArgs Event

Question

I have the following code:

public void tbSpeed_KeyDown(object sender, KeyRoutedEventArgs e)
{
    e.Handled = !((e.Key >= 48 && e.Key <= 57) ||         


        

Answer 1

For Win10 UWP I noticed that the CTRL and SHIFT keys were set at Locked state. So I did the following:

var shiftState = CoreWindow.GetForCurrentThread().GetKeyState(VirtualKey.Shift);
var ctrlState = CoreWindow.GetForCurrentThread().GetKeyState(VirtualKey.Control);

var isShiftDown = shiftState != CoreVirtualKeyStates.None;
var isCtrlDown = ctrlState != CoreVirtualKeyStates.None;

Answer 2

Bitwise AND the Modifiers property of Keyboard with Shift Key -

bool isShiftKeyPressed = (Keyboard.Modifiers & ModifierKeys.Shift)
                         == ModifierKeys.Shift;

Try this too-

bool isShiftKeyPressed = (ModifierKeys & Keys.Shift) == Keys.Shift;

OR

Control.ModifierKeys == Keys.Shift

Answer 3

Use GetKeyState. e.g.

var state = CoreWindow.GetForCurrentThread().GetKeyState(VirtualKey.Shift);
return (state & CoreVirtualKeyStates.Down) == CoreVirtualKeyStates.Down;

Note: For Alt, you would use VirtualKey.Menu.

Answer 4

You can try the following code

CoreVirtualKeyStates controlKeyState = Window.Current.CoreWindow.GetKeyState(VirtualKey.Control);
var  ctrl = (controlKeyState & CoreVirtualKeyStates.Down) == CoreVirtualKeyStates.Down;

CoreVirtualKeyStates shiftKeyState = Window.Current.CoreWindow.GetKeyState(VirtualKey.Shift);
var shift = (shiftKeyState & CoreVirtualKeyStates.Down) == CoreVirtualKeyStates.Down;