Can't use KeyCode in C#

Question

I'm trying to make it so that when the user pressed the PrintScreen button on their keyboard, a Messagebox appears.

I've looked a lot online and this code seems to be the standard of how to go about doing that.

The issue is, I get an error saying,

System.Windows.Forms.KeyPressEventArgs' does not contain a definition for 'KeyCode' and no extension method 'KeyCode' accepting a first argument of type 'System.Windows.Forms.KeyPressEventArgs' could be found (are you missing a using directive or an assembly reference?)

    private void Form1_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (e.KeyCode == Keys.PrintScreen)
        {
            MessageBox.Show("Test");
        }
    }

All right. Use the `KeyDown` or `KeyUp` events to access `KeyCode`. — Dmitry, Apr 30 '15 at 05:41
Is it winform or WPF? Please include namespace and directives you have used. — Priyank Sheth, Apr 30 '15 at 05:42
@Dmitry I no longer get an error, but now nothing happens when I press the PrintScreen button on my keyboard — DanMossa, Apr 30 '15 at 05:43
It's hardly a "stupid question". You would know by what references and using statements your project has. — jdphenix, Apr 30 '15 at 05:46
possible duplicate of [C# How to translate virtual keycode to char?](http://stackoverflow.com/questions/318777/c-sharp-how-to-translate-virtual-keycode-to-char) — Shaharyar, Apr 30 '15 at 05:49

score 6 · Accepted Answer · answered Apr 30 '15 at 05:45

6

Instead of using KeyPress, use the KeyDown event. KeyPress event will only fire on printable characters, and PrintScreen is not one of them, so it only exposes the KeyChar property, while KeyDown or KeyUp will expose the KeyCode.

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    if(e.KeyCode == Keys.PrintScreen)
    {
        MessageBox.Show("Test");
    }
}

answered Apr 30 '15 at 05:45

Andrej Kikelj

800
7
11

Thank you very much, that helped but when I press PrintScreen, no messagebox appears – DanMossa Apr 30 '15 at 05:45
1

Have you added the event through the window properties in the designer or just copypasted the code? – Andrej Kikelj Apr 30 '15 at 05:47
Is this what you're talking about? http://i.imgur.com/6oVqxEa.png I believe I added an event – DanMossa Apr 30 '15 at 05:48
1

I figured it out. I needed to set KeyPreview to True – DanMossa Apr 30 '15 at 05:50

score 0 · Answer 2 · answered Apr 30 '15 at 05:51

0

You can use

 e.Key == Key.Snapshot

This will work on KeyUp and KeyDown events.

answered Apr 30 '15 at 05:51

Jar Yit

955
11
22

Can't use KeyCode in C#

2 Answers2