async void select(object sender, SelectedItemChangedEventArgs e)
        {
            var si = e.SelectedItem as Schedule;

            ID = si.Id;

            sa.IsEnabled     = true;
            da.IsEnabled     = true;
            update.IsEnabled = true;
            delete.IsEnabled = true;

            tap_num    = e.SelectedItemIndex;
            flightline = new Schedule();
            flightline = await CosmosScheduleDBService.GetFlightById(ID);

            // For update new created item
            if (flightLists.Count != 0)
            {
                flightline.sourceTime      = flightLists[tap_num].sourceTime;
                flightline.destinationTime = flightLists[tap_num].destinationTime;
                flightline.price           = flightLists[tap_num].price;
                flightline.company         = flightLists[tap_num].company;
                flightline.airplane        = flightLists[tap_num].airplane;
                flightline.days            = flightLists[tap_num].days;
            }
            else
            {
                flightline.sourceTime      = flightTableViewModel.FlightList[tap_num].sourceTime;
                flightline.destinationTime = flightTableViewModel.FlightList[tap_num].destinationTime;
                flightline.price           = flightTableViewModel.FlightList[tap_num].price;
                flightline.company         = flightTableViewModel.FlightList[tap_num].company;
                flightline.airplane        = flightTableViewModel.FlightList[tap_num].airplane;
                flightline.days            = flightTableViewModel.FlightList[tap_num].days;
            }

            //flightline = flightTableViewModel.FlightList[tap_num];
            st = flightline.sourceTime;
            et = flightline.destinationTime;

            Console.WriteLine(tap_num + " " + flightline.airplane);
        }
 async Task ExecuteGetFlight()
 {
     flight = await CosmosScheduleDBService.GetFlightById(vehicleId);
 }
 async Task ExecuteSearchCommand(string _id)
 {
     flight = await CosmosScheduleDBService.GetFlightById(_id);
 }