private void btnFRemove_Click(object sender, EventArgs e)
{
if (IsInt(txtFlightId) == false)
{
MessageBox.Show("Id is not an integer");
txtFlightId.Focus();
return;
}
int id = Int32.Parse(txtFlightId.Text);
KeyValuePair <int, String> selectedPair_airplane = (KeyValuePair <int, String>)comboAirplane.SelectedItem;
int airplane_id = selectedPair_airplane.Key;
if (flightDAO.isExistedFlightForDelete(id, airplane_id))
{
if (flightDAO.isFlightBooked(id) == false)
{
flightDAO.deleteOwnerFlight(id, airplane_id);
flightDAO.deleteFlight(id);
MessageBox.Show("Delete successfully");
clearDataFlight();
updateDatagridFlight();
}
else
{
MessageBox.Show("Cancel delete flight because user has booked it");
}
}
else
{
MessageBox.Show("flight is not existed");
}
}