handling function key press

Question

I have a C# form with 5 buttons. The users enters the information and depending on the press of a function key, a specific action is performed. F9-Execute Order, F6-Save, F3-LookUp.

I have added the foolowing code:

OnForm_Load

this.KeyUp += new System.Windows.Forms.KeyEventHandler(KeyEvent);

and

private void KeyEvent(object sender, KeyEventArgs e) //Keyup Event 
    {
        if (e.KeyCode == Keys.F9)
        {
            MessageBox.Show("Function F9"); 
        }
        if (e.KeyCode == Keys.F6)
        {
            MessageBox.Show("Function F6");
        }
        else
            MessageBox.Show("No Function");

    }

but nothing happens

Thanks

yu_sha · Accepted Answer · 2009-11-10 10:53:27Z

51

You need to set

KeyPreview=True

for your form. Otherwise key press is swallowed by the control that has focus.

answered Nov 10, 2009 at 10:53

yu_sha

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2 Comments

Ch3shire Over a year ago

Also in the last Visual Studio C# standard you need to set method to PreviewKeyDown instead of KeyPress to get function key working.

Christian Over a year ago

Ch3shire, using VS2017 I'm still getting all events on KeyPress with KeyPreview=true. I see no events fired on OnKeyPreviewDown. The setting works fine though.

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