Numpad key codes in C#

Question

I use these following codes to work with numpad keys.

if (e.KeyCode == Keys.NumPad0 || e.KeyCode == Keys.D0)
{
   MessageBox.Show("You have pressed numpad0");
}
if (e.KeyCode == Keys.NumPad1 || e.KeyCode == Keys.D1)
{
   MessageBox.Show("You have pressed numpad1");
}

And also for the other numpad keys. But I want to know how I can to this for "+" , "*" , "/" , " -" , " . " which located next to the numpad keys.

Thanks in advance

Answer 1

Check out the entire Keys enum . You have Keys.Mutiply, Keys.Add, and so forth.

Note that Keys.D0 is not the numpad 0, it's the non-numpad 0.

Answer 2

For "+" , "*" , "/" , we can use KeyDown event and for "-" , "." we can use KeyPress event.

Here are the codes :

private void button1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Add)
        {
            MessageBox.Show("You have Pressed '+'");
        }
        else if (e.KeyCode == Keys.Divide)
        {
            MessageBox.Show("You have Pressed '/'");
        }
        else if (e.KeyCode == Keys.Multiply)
        {
            MessageBox.Show("You have Pressed '*'");
        }
    }
private void button1_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (e.KeyChar == '.')
        {
            MessageBox.Show("You have pressed '.'");
        }
        else if (e.KeyChar == '-')
        {
            MessageBox.Show("You have pressed '-'");
        }
    }