KeyPress Event C#

Question

I've got a "Home" screen with 9 buttons. All text properties for the buttons are set like: &Returns so that the R is underlined in the display.

So when I press R at home screen I want the Returns screen to load. This is what I have:

private void frmHome_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == (char)Keys.R)
    {
        frmReturns R = new frmReturns(empid);
        R.Show();
        this.Hide();
        e.Handled = true;
    }
}

But that does absolutely nothing. Can someone please help?

How does it behave? Does the event fire at all? Does it fire and the If condition doesn't pass? — dutzu, Feb 21 '13 at 08:50
You should check all the other posts relating to this type of functionality. Like for example this one http://stackoverflow.com/questions/5048748/how-to-set-hotkeys-for-a-winform — dutzu, Feb 21 '13 at 08:51
Try hooking to a different event like Key_Down and make sure the form has Focus, otherwise the event will be triggered to another target. — dutzu, Feb 21 '13 at 08:53

Dmitrii Dovgopolyi · Accepted Answer · 2013-02-21T09:03:57.763

3

You should set KeyPreview property of your form to true

this.KeyPreview = true;

otherwise the event of pressed key will be raised in some inner controls of form, not in the main form.

Also, your comparison is case sensitive. e.KeyChar == (char)Keys.R will only work for R but not for r.

if(char.ToUpper(e.KeyChar) == (char)Keys.R)

edited Feb 21 '13 at 09:03

answered Feb 21 '13 at 08:55

Dmitrii Dovgopolyi

6,231
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Thanks, just noticed I don't have the KeyPreview event. Developing a Device Application. I need a alternative. – Werner van den Heever Feb 21 '13 at 09:08
@WernervandenHeever what Compact Framework version are you targeting? – Mark Hall Feb 21 '13 at 09:12
@WernervandenHeever key preview is not an event. It is a property. – Dmitrii Dovgopolyi Feb 21 '13 at 09:28
in http://msdn.microsoft.com/en-us/library/system.windows.forms.form.keypreview(v=vs.80).aspx the supported platforms of KeyPreview: Windows CE, Windows Mobile for Pocket PC, Windows Mobile for Smartphone – Dmitrii Dovgopolyi Feb 21 '13 at 09:30
@DmitryDovgopoly k, my bad.. Property – Werner van den Heever Feb 21 '13 at 09:30
So, do you have it? Because msdn says you should. – Dmitrii Dovgopolyi Feb 21 '13 at 09:35
I do. And I did try it but didn't work. Not sure what my mistake was the first time I tried Keypreview but its working now. Thanks for helping. – Werner van den Heever Feb 21 '13 at 09:51

score 0 · Answer 2 · edited May 23 '17 at 11:56

0

I think this post is on a similar vein: CTRL + S to submit form and all inputs

I've done something similar to this and it does work. It might need more input, as you dont want to accidentally be typing hit r to have the page redirect somewhere before you have finished?

edited May 23 '17 at 11:56

Community

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answered Feb 21 '13 at 08:50

Luke Duddridge

4,285
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KeyPress Event C#

2 Answers2