Detecting Enter key press on a button c#

Question

This piece of code detect most keys and puts it in a messageBox, but one of the keys it doesn't is the enter key. *Note it is a key_down method

MessageBox.Show(e.KeyData.ToString());

so far I have tried so many methods to fix and searched a lot for an answer I have tried this

private void button1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{

    if (e.KeyCode == Keys.Enter)
    {


        MessageBox.Show("this is it");
        e.IsInputKey = true;
    }

}

it says 0 references which I know I'm not calling the method but where do I call it? where ever I do call it, it gives an error.

Answer 1

you delete this line

 e.IsInputKey = true;

 private void button1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
        {
            MessageBox.Show("this is it");
            //e.IsInputKey = true;
        }
    }

or

    private void button1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
        {
            MessageBox.Show("this is it");
            //e.IsInputKey = true;
        }
    }

Answer 2

In your Form1 Design Properties:

AcceptButton Property set dropdown to button1 or the name of your Button

KeyUp Event of your Button

private void button1_KeyUp(object sender, KeyEventArgs e)
{
     if (e.KeyCode == Keys.Enter)
      {
          MessageBox.Show("Enter key has been pressed");
      }
}

or

 private void button1_KeyUp(object sender, KeyEventArgs e)
        {
            button1_KeyDown(sender, e);
        }

        private void button1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                MessageBox.Show("Enter key has been pressed");
            }
        }

Answer 3

Put this line soon after: InitializeComponents(); --> button1.PreviewKeyDown +=new PreviewKeyDownEventHandler(button1_PreviewKeyDown); .
The event you're trying to use will only fire when you focus on that button. The focus is passed in 2 different ways ( via user interaction ) one of which is an actual mouse click on that element and another is "tabbing" on to the control, and make sure you read about "Events" and "EventsHandlers"