Listbox selected event firing automatically?

Question

I've a winform and I'm trying to bind some elements at page load method. After that

listBox1_SelectedIndexChanged event fires automatically. Why it is happening?

Thanks in advance, Nagu

Answer 1

I assume that this is because your list box begins life with no items in it (so its SelectedIndex property is -1). As soon as it's populated, its SelectedIndex property changes to 0 (to select the first item in the now populated list box) and then SelectedIndexChanged event is now fired.

Answer 2

disable the event prior to binding:

listBox1.SelectedIndexChanged -= listBox1_SelectedIndexChanged;

re-enable after binding:

listBox1.SelectedIndexChanged += listBox1_SelectedIndexChanged;