Question

I have Windows Form named – Form1 and inside Form1 I have a panel named panel1. I use this panel only to add buttons in him. For now there are exactly 9 buttons but I intend to change their number dynamicly if this has something to do with my current problem. What I need is way to detect a when a button from this panel is clicked (I have other buttons too but, they are in Form1 outside the panel) and also to know exactly which button was clicked.
I tried this:

private void panel1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("HI" + sender);
        }

As you can see, it’s not much, but was enough to see that I can’t do that using pnael1's_click event. Using this code I get the message box when I click anywhere in the panel except the buttons. So how can I do that. Is it possible to do it from inside panel1 or I should group those buttons using another approach but it’s important to be able to keep the difference between those buttons which are now in panel1 and the other buttons I may (and in in fact I do have)?

Answer 1

As long as you aren’t adding controls dynamically over time, and the number of buttons is fixed as soon as the form is initialized, you can use this to add a click event handler to all buttons within a panel:

foreach (var button in panel.Controls.OfType<Button>())
{
    button.Click += HandleClick;
}