Why doesn't this KeyPress code work?

Question

1.00/5 (1 vote)

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Hi,

I am new to C# programming and I'm trying to make a little test application. When you press the D key, a message box will pop up. However, it doesn't seem to be working. Please may you see if you can find the problem and fix it.

C#

private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == (char)Keys.D)
    {
        MessageBox.Show("You pressed D!");
    }

}

Remember to please tell me the problem in simple terms because I really don't understand C# too well yet...

Thanks!

EDIT: I've tried the code with a different key (Left) and it still fails to work correctly...

Posted 12-Oct-12 6:38am

OrangeFlash81

Updated 12-Oct-12 6:46am

v2

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Comments

fjdiewornncalwe 12-Oct-12 12:39pm

Are you sure you aren't pressing 'd' instead of 'D'?

OrangeFlash81 12-Oct-12 12:44pm

Erm... I've tried pressing both a capitalized D and a lowercase D on my keyboard and they don't work, if that's what you meant.

fjdiewornncalwe 12-Oct-12 12:48pm

I did. I just mention it as a comment because I know too many people who have done that and you didn't mention in your question that you had so I was doing the default "Is it plugged in" support response. :)

[no name] 12-Oct-12 12:48pm

If you mean "does not work" as in the event is not fired, you need to set your KeyPreview property to True on your form.

OrangeFlash81 12-Oct-12 12:51pm

Thanks! Solved!

fjdiewornncalwe 12-Oct-12 12:49pm

If you place a breakpoint in the handler, does it get hit?

2 solutions

Solution 2

if it is windows application,
then check KeyPreview property of your form it should be True

and form have focus.

Happy Coding!
:)

Posted 12-Oct-12 6:54am

Aarti Meswania

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**AmitGajjar** · Accepted Answer · 2012-10-12T06:45:00

Solution 1

Hi,

The possible cause is your keyboard focus is not on the form. if you have added more number of controls on your form and your tab focus is on some control then it will not fire the event.

If you want to fire this event, make sure your current focus is on the form.

Hope you got the idea.

Best luck

Posted 12-Oct-12 6:45am

AmitGajjar

Comments

OrangeFlash81 12-Oct-12 12:48pm

Ahh, okay, I see what you mean. If I want a 'universal focus' if you will (it doesn't matter what you are focused on), what should I use?

AmitGajjar 12-Oct-12 12:55pm

there can be two option. when you need to capture the keypress event either you focus your current tab on the form or you can create system level programming to read each key strokes(See here).