// Check the status of a selected seat
private void btnSeatStatus(object sender, EventArgs e)
{
// validation if user selected a seat
// checks seat selection
try
{
try
{
if (String.IsNullOrWhiteSpace(lstBoxRow.SelectedItem.ToString()))
{
throw new InvalidOperationException("Select a row");
}
}
catch (NullReferenceException)
{
throw new InvalidOperationException("Select a row");
}
try
{
if (String.IsNullOrWhiteSpace(lstBoxSeat.SelectedItem.ToString()))
{
throw new InvalidOperationException("Select a seat");
}
}
catch (NullReferenceException)
{
throw new InvalidOperationException("Select a seat");
}
lblMessages.Text = ""; // remove any warnings
string seat = lstBoxRow.SelectedItem.ToString();
seat += lstBoxSeat.SelectedItem.ToString();
bool seatStatus = AirplaneService.SeatStatus(seat);
if (seatStatus)
{
txtStatus.Text = "Seat available";
}
else
{
txtStatus.Text = "Seat not available";
}
}
catch (InvalidOperationException ex)
{
lblMessages.Text = ex.Message;
}
}
