private void comboBox4_SelectedIndexChanged(object sender, EventArgs e)
{
int tempECTS = 0, tempOcjena = 0;
DateTime datum = new DateTime();
DBCommunation.printProperty((string)comboBox4.SelectedItem, ref tempECTS, ref tempOcjena, ref datum);
textBox8.Text = (string)comboBox4.SelectedItem;
textBox9.Text = Convert.ToString(tempECTS);
textBox10.Text = Convert.ToString(tempOcjena);
textBox11.Text = Convert.ToString(date);
}
