public RaffleViewModel(RaffleService raffleService)
{
if (raffleService == null)
{
throw new ArgumentNullException("raffleService");
}
_raffleService = raffleService;
}
private void BeginUIWait(PaymentClass paymentClass, CancellationToken token)
{
//just want dirty numbers
var rnd = new System.Random();
var tickets = RaffleService.GetTickets(paymentClass);
while (!token.IsCancellationRequested)
{
FacadeTicket = tickets.ElementAt(rnd.Next(0, tickets.Count()));
}
FacadeTicket = null;
}
public MainWindow()
{
InitializeComponent();
Raffle = new RaffleService();
Timer = new System.Timers.Timer();
Timer.Interval = 10;
Timer.Elapsed += (sender, e) =>
{
_labelTicket.Dispatcher.Invoke(new Action(() =>
{
var ticket = Raffle.GetRandomTicket((PaymentClass)Enum.Parse(typeof(PaymentClass), _comboType.SelectedItem.ToString()));
_labelName.Content = ticket.Name;
_labelTicket.Content = ticket.TicketCode;
DoEvents();
}));
};
Timer.Enabled = false;
_comboType.ItemsSource = Enum.GetNames(typeof(PaymentClass));
_comboType.SelectedIndex = 0;
}
protected virtual void OnDrawRaffleVictor(PaymentClass paymentClass)
{
try
{
CanExecuteRaffle = false;
WinningTicket = null;
CancellationTokenSource cts = new CancellationTokenSource();
//todo: find a better way to handle this asynchronously
Task.Run(() =>
{
BeginUIWait(paymentClass, cts.Token);
});
Task.Run(async() =>
{
var ticket = RaffleService.GetRandomTicket(paymentClass);
await Task.Delay(TimeSpan.FromSeconds(3));
return(ticket);
})
.ContinueWith((t) =>
{
cts.Cancel();
WinningTicket = t.Result;
CanExecuteRaffle = true;
});
}
catch (Exception ex)
{
HandleException?.Invoke(this, ex);
}
}