private void comboStatistic_SelectedValueChanged(object sender, EventArgs e)
{
String current_value = comboStatistic.SelectedItem.ToString();
if (current_value.Equals("All"))
{
dataGridStatistic.DataSource = null;
dataGridStatistic.DataSource = flightDAO.GetAllFlight();
}
if (current_value.Equals("Booked-Ticket"))
{
dataGridStatistic.DataSource = null;
dataGridStatistic.DataSource = flightDAO.GetAllBookedFlight();
}
if (current_value.Equals("Free-Ticket"))
{
dataGridStatistic.DataSource = null;
dataGridStatistic.DataSource = flightDAO.GetAllFreeFlight();
}
}