KeyDown event not Working on PrintScreen Key

问题

I am using C# windows Application

I am checking which key, user have pressed down by keyboard. I have checked for all keys but its not working in case of printScreen

private void comboBox1_KeyDown(object sender, KeyEventArgs e)
{
        MessageBox.Show(e.KeyCode.ToString());
}

So how to detect PrintScreen Key

回答1:

You can use KeyUp, It captures PrintScreen key.

回答2:

The print-screen key is trapped by the OS before it is sent to applications. To detect such keys, you need to use a keyboard hook. You may be interested in this article: Low-level Windows API hooks from C# to stop unwanted keystrokes

回答3:

You can use

e.Key == Key.Snapshot

This will work on KeyUp event

回答4:

If the KeyUp event still does not work try modifying the forms KeyPreview property to true, then test the the KeyUp event again.

来源：https://stackoverflow.com/questions/4292925/keydown-event-not-working-on-printscreen-key