/// <summary>
/// Обращается к базе данных и находит в ней поезд, соответствующий переданному в параметре, и уменьшает у него количество билетов на 1.
/// После окончания этой операции вызывает у класса MainWindow метод BookingReady.
/// </summary>
/// <param name="CurrentTrain"></param>
public static void BookTicket(Train CurrentTrain)
{
using (ContextForBookingDataBase BookingDBcontext = new ContextForBookingDataBase(NamesOfVariables.ConnectionStringName))
{
BookingDBcontext.ListOfTrains.First((res) => res.TrainName == CurrentTrain.TrainName).AmountOfFreeTickets = CurrentTrain.AmountOfFreeTickets;
BookingDBcontext.SaveChanges();
Application.Current.Dispatcher.Invoke(new Action(() => ApplicationMainWindow.BookingReady()));
}
}
/// <summary>
/// Возвращает список имен станций из базы данных.
/// </summary>
/// <returns></returns>
public static ObservableCollection<string> GetNamesOfStations()
{
ObservableCollection<string> AllStations = new ObservableCollection<string>();
using (ContextForBookingDataBase BookingDBcontext = new ContextForBookingDataBase(NamesOfVariables.ConnectionStringName))
{
foreach (Station CurrentStation in BookingDBcontext.ListOfStations)
{
AllStations.Add(CurrentStation.StationName);
}
}
return AllStations;
}
/// <summary>
/// Ищет в базе данных поед, который останавливается на двух указанных станциях
/// и вызывает у класса MainWindow метод SearchOver с найденным поездом или null в качестве аргумента.
/// </summary>
/// <param name="DepartureStationName"></param>
/// <param name="DestinationStationName"></param>
/// <returns></returns>
public static void SearchTrain(string DepartureStationName, string DestinationStationName)
{
Train ResultTrain = null;
int AmountOfFoundStations;
using (ContextForBookingDataBase BookingDBcontext = new ContextForBookingDataBase(NamesOfVariables.ConnectionStringName))
{
bool DepartureStationExist = false;
bool DestinationStationExist = false;
if (BookingDBcontext.ListOfStations.Where((res) => res.StationName == DepartureStationName).Count() > 0)
{
DepartureStationExist = true;
}
if (BookingDBcontext.ListOfStations.Where((res) => res.StationName == DestinationStationName).Count() > 0)
{
DestinationStationExist = true;
}
if (DepartureStationExist && DestinationStationExist)
{
List<Train> AllTrains = new List<Train>();
foreach (Train CurrentTrain in BookingDBcontext.ListOfTrains)
{
AllTrains.Add(CurrentTrain);
}
bool TrainWasFound = false;
foreach (Train CurrentTrain in AllTrains)
{
AmountOfFoundStations = CurrentTrain.Stations.Where((res) => res.StationName == DepartureStationName || res.StationName == DestinationStationName).Count();
if (AmountOfFoundStations == 2)
{
ResultTrain = CurrentTrain;
Application.Current.Dispatcher.Invoke(new Action(() => ApplicationMainWindow.SearchOver(ResultTrain, true, true)));
TrainWasFound = true;
break;
}
}
if (!TrainWasFound)
{
Application.Current.Dispatcher.Invoke(new Action(() => ApplicationMainWindow.SearchOver(null, true, true)));
}
}
else
{
Application.Current.Dispatcher.Invoke(new Action(() => ApplicationMainWindow.SearchOver(null, DepartureStationExist, DestinationStationExist)));
}
}
}
/// <summary>
/// Возвращает список имен станций из базы данных.
/// </summary>
/// <returns></returns>
public static List<string> GetNamesOfStations(string ConnectionStringName)
{
List<string> AllStations = new List<string>();
using (ContextForBookingDataBase BookingDBcontext = new ContextForBookingDataBase(ConnectionStringName))
{
foreach (Station CurrentStation in BookingDBcontext.ListOfStations.OrderBy((res) => res.StationName))
{
AllStations.Add(CurrentStation.StationName);
}
}
return AllStations;
}
