Detecting the user pressing F10 in WPF

wpf keyboard-events
teedyay picture teedyay · Jan 20, 2010 · Viewed 12.1k times · Source

My WPF application has behaviour triggered by the functions keys (F1-F12).

My code is along these lines:

private void Window_KeyDown(object sender, KeyEventArgs e)
{
    switch (e.Key)
    {
        case Key.F1:
        ...
        case Key.F2:
        ...
    }
}

This works for all F-keys except F10. Debugging, I find that e.Key == Key.System when the user presses F10.

In the enum definition, F10 = 99 and System = 156, so I can rule out it being a duplicate enum value (like PageDown = Next = 20).

So, how do I tell when the user presses F10?

Is it safe to check for Key.System instead? This feels a little dirty - might it be possible that Key.System would ever result from some other key being pressed? Or is there some setting somewhere that will make F10 report as Key.F10?

Answer

Will Eddins picture Will Eddins · Jan 20, 2010

In addition to Yacoder's response, use the following to check for the F10 key:

case Key.System:
  if (e.SystemKey == Key.F10)
  {
    // logic...
  }

The SystemKey property will tell you which System key was pressed.

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