[C# Key down event can not work]

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I code a project C# for testing usercontrol. I add it to the form and it works. But when i use Form_KeyDown event, it doesn't jump into the funtion (I had checked breakpoint).
when I disable "this.Controls.Add(newControl)", it returns to work.
I don't unsderstand where i'm wrong
Please, help me.
Thanks so much.

Posted 15-Nov-10 7:03am

Slave_hunter_KaKa

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3 solutions

Solution 1

Why are you trying to handle keydown in the form?

Try setting the ActiveControl property to null and see if that helps (I'm not sure it will).

Either that, or handle the keydown event in the control and set e.Handled to false in the control's event handler.

Posted 15-Nov-10 7:21am

#realJSOP

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Slave_hunter_KaKa 15-Nov-10 21:39pm

Thanks for reply John.
I have problem in the form. I try Form.Active(), or Form.ActiveControl = null.
But bug not yet settled.

Solution 3

It does work as explained. KeyPreview tells the form that it gets first look at all keyboard event before they are dispatched to the control that has focus. There's something else you're not telling us about.

Posted 15-Nov-10 16:14pm

Dave Kreskowiak

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Dave Kreskowiak · Accepted Answer · 2010-11-15T08:08:00

Solution 2

Your control has the focus, so no keyboard events will work on the form, UNLESS, you set the form's KeyPreview property to True first.

Posted 15-Nov-10 8:08am

Dave Kreskowiak

Comments

Slave_hunter_KaKa 15-Nov-10 21:43pm

Thank you, Dave.
I do as you said. But it didn't solve.
Even i can not catch KeyDown, i can handle MouseDown event on the Form.

Slave_hunter_KaKa 16-Nov-10 5:30am

Dear Dave.
I think i misunderstood. I set keypreview to true and capture keydown successfully.
Thank you so much. :D

#realJSOP 16-Nov-10 5:38am

My Vote of 5 - This should be marked as the answer.