public bool DeleteCity(City city)
{
try
{
if (!this.context.CitySet.Contains(city))
{
throw new ArgumentException(string.Format("The database does not contain {0} city", city));
}
this.context.CitySet.Remove(city);
this.context.SaveChanges();
return true;
}
catch (SqlException e)
{
Console.WriteLine(e.Message);
return false;
}
catch (ArgumentException e)
{
Console.WriteLine(e.Message);
return false;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return false;
}
}
public ScheduleAddWindow(TicketDB dbContext, City startCity, City endCity, Train train)
{
InitializeComponent();
this.dbContext = dbContext;
this.startCity = startCity;
this.endCity = endCity;
this.train = train;
}
public AdminWindow(TicketDB dbContext, User user)
{
InitializeComponent();
this.dbContext = dbContext;
this.user = user;
startCityForSchedule = null;
endCityForSchedule = null;
trainForSchedule = null;
beginEditCity = null;
beginEditTrain = null;
beginEditSchedule = null;
}
static void Main ( string[] args )
{
using(var db = new TicketSystemModel())
{
//db.Database.Create();
Console.WriteLine("Enter a name of a city:");
string name = Console.ReadLine();
City city = new City() { CityID = 1 , Name = name };
db.Cities.Add(city);
db.SaveChanges();
}
}
public bool AddCity(City city)
{
try
{
this.context.CitySet.Add(city);
this.context.SaveChanges();
return true;
}
catch (SqlException e)
{
Console.WriteLine(e.Message);
return false;
}
}
private void cityDataGrid_BeginningEdit(object sender, DataGridBeginningEditEventArgs e)
{
if (!e.Row.IsEditing)
{
var city = e.Row.Item as City;
if (city != null)
{
beginEditCity = new City();
beginEditCity.CityID = city.CityID;
beginEditCity.Name = city.Name;
}
}
}
private void startCityButton_Click(object sender, RoutedEventArgs e)
{
var selectedItem = cityDataGrid.SelectedItem;
if (selectedItem != null)
{
var selectedCity = selectedItem as City;
if (selectedCity != null)
{
int endCityId = endCityForSchedule?.CityID ?? -1;
if (selectedCity.CityID != endCityId)
{
startCityForSchedule = selectedCity;
chosenStartCityLabel.Content = $"Start city: {selectedCity.CityID} - {selectedCity.Name}";
startCityInScheduleLabel.Content = $"{selectedCity.CityID} - {selectedCity.Name}";
return;
}
else
{
MessageBox.Show("Start and end city cannot be the same!");
return;
}
}
}
MessageBox.Show("Plese select a city from the grid!");
}
private void cityDataGrid_RowEditEnding(object sender, DataGridRowEditEndingEventArgs e)
{
var city = e.Row.Item as City;
if (city != null)
{
if (city.CityID != 0)
{
try
{
if (city.Name.Length < 1)
{
MessageBox.Show("City should have a name! Nothing saved to database!");
city.Name = beginEditCity.Name;
e.Row.Item = null;
e.Row.Item = city;
}
else
dbContext.SaveChanges();
}
catch (Exception ex)
{
MessageBox.Show($"Could not update database! Error message: {ex.Message}");
}
}
else
{
try
{
if (city.Name.Length < 1)
{
MessageBox.Show("City should have a name! Nothing saved to database!");
var currentItemsSource = trainDataGrid.ItemsSource;
trainDataGrid.ItemsSource = null;
trainDataGrid.Items.Remove(e.Row);
trainDataGrid.ItemsSource = currentItemsSource;
}
else
{
dbContext.Cities.Add(city);
dbContext.SaveChanges();
e.Row.Item = null;
e.Row.Item = city;
}
}
catch (Exception ex)
{
MessageBox.Show($"Could not update database! Error message: {ex.Message}");
}
}
}
beginEditCity = null;
}
private void cityDataGrid_PreviewCanExecute(object sender, CanExecuteRoutedEventArgs e)
{
var cityToDelete = cityDataGrid.SelectedItem as City;
if (e.Command == DataGrid.DeleteCommand)
{
if (MessageBox.Show(string.Format("Would you like to delete {0}?",
cityToDelete.Name),
"Confirm Delete",
MessageBoxButton.YesNo,
MessageBoxImage.Question,
MessageBoxResult.No) != MessageBoxResult.Yes)
{
e.Handled = true;
}
else
{
try
{
var schedulesToDelete = from schedule in dbContext.Schedules
where schedule.StartCityID == cityToDelete.CityID
|| schedule.EndCityID == cityToDelete.CityID
select schedule;
foreach (var schedule in schedulesToDelete)
{
var ticketsToDelete = from ticket in dbContext.Tickets
where ticket.ScheduleID == schedule.ScheduleID
select ticket;
dbContext.Tickets.RemoveRange(ticketsToDelete);
var seatsToDelete = from seat in schedule.Train.Seats
where seat.ScheduleID == schedule.ScheduleID
select seat;
dbContext.Seats.RemoveRange(seatsToDelete);
dbContext.Schedules.Remove(schedule);
}
dbContext.Cities.Remove(cityToDelete);
dbContext.SaveChanges();
if(cityToDelete.CityID == (startCityForSchedule?.CityID ?? -1))
{
startCityForSchedule = null;
chosenStartCityLabel.Content = "Start city: None";
startCityInScheduleLabel.Content = "None";
}
else if (cityToDelete.CityID == (endCityForSchedule?.CityID ?? -1))
{
endCityForSchedule = null;
chosenEndCityLabel.Content = "End city: None";
endCityInScheduleLabel.Content = "None";
}
UpdateDataGrids();
}
catch (Exception ex)
{
e.Handled = true;
MessageBox.Show($"Could not delete item in database! Error message: {ex.Message}");
}
}
}
}
// TODO : edit a trip
public IEnumerable<Schedule> AllTripsFrom(City a, City b)
{
return this.context.ScheduleSet.Where(x => x.StartCity.ToString().Equals(a.ToString()) && x.EndCity.ToString().Equals(b.ToString()));
}
public ComboBoxCustomItem(City city)
{
CustomItem = city;
Content = city.Name;
}
private static void CreateCity()
{
using (var db = new TicketDB())
{
Console.WriteLine("Creating city!");
Console.Write("Name: ");
var name = Console.ReadLine().Trim();
try
{
City city = new City
{
Name = name
};
db.Cities.Add(city);
db.SaveChanges();
}
catch (OptimisticConcurrencyException ex)
{
Console.WriteLine("Cannot insert city in database! Operation exited with message:");
Console.WriteLine(ex.Message);
return;
}
Console.WriteLine("City created successfully!");
}
}