private void btnIzmeni_Click(object sender, EventArgs e)
{
if (listaPredmeta.SelectedItems.Count == 0)
{
MessageBox.Show("Izaberite angazman koji zelite na izmenite!");
return;
}
int idAngazmana = Int32.Parse(listaPredmeta.SelectedItems[0].SubItems[0].Text);
AngazmanBasic a = DTOManager.vratiAngazman(idAngazmana);
AzuriranjeAngazmanaForm formaAzuriranje = new AzuriranjeAngazmanaForm(a);
formaAzuriranje.ShowDialog();
this.popuniTabeluPodacima();
}