CODEWITHSUNDEEP
c#winforms
Ali Vojdanian
Ali Vojdanian

Reputation: 2111

Numpad key codes in C#

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

Upvotes: 6

Views: 37740

Answers (4)

Mustafa Ozbalci
Mustafa Ozbalci

Reputation: 115

There is a simple way to learn all the keycodes without checking the manuals.

Create a form and then go to KeyDown event of the form then add this

private void Form1_KeyDown(object sender, KeyEventArgs e)
   {
      MessageBox.Show(e.KeyCode.ToString());
   }

Then you will get the name of the any key you have pressed on your keyboard

Upvotes: 1

MinusZero
MinusZero

Reputation: 11

I used switch to make mine work.

I am making a calculator and created a KeyDown even on the target textbox. I then used:

switch (e.KeyCode)
{
    case Keys.NumPad1:
        tbxDisplay.Text = tbxDisplay.Text + "1";
    break;
    case Keys.NumPad2:
        tbxDisplay.Text = tbxDisplay.Text + "2";
    break;
    case Keys.NumPad3:
        tbxDisplay.Text = tbxDisplay.Text + "3";
    break;
}

etc.

The other thing to consider is that if the user then clicked an on screen button, the focus would be lost from the textbox and the key entries would no longer work. But thats easy fixed with a .focus() on the buttons.

Upvotes: 0

Ali Vojdanian
Ali Vojdanian

Reputation: 2111

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 '-'");
        }
    }

Upvotes: 6

zmbq
zmbq

Reputation: 39013

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.

Upvotes: 14

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