Exemple #1
0
        public static void StartIt()
        {
            TrainSignal ts = new TrainSignal();

            Car car1 = new Car(ts);
            Car car2 = new Car(ts);
            Car car3 = new Car(ts);
            Car car4 = new Car(ts);

            ts.TrainIsComing();

            Console.WriteLine("Set the delegate to NULL.");

            ts.OnTrainSignal1 = null;
            ts.OnTrainSignal2 = null;
            // ts.OnTrainSignal3 = null; // this is not possible on an event
            // ts.OnTrainSignal4 = null;  // this bad

            ts.TrainIsComing();

            //    ts.OnTrainSignal1();  -- Crash
            //    ts.OnTrainSignal2();  -- Crash
            // ts.OnTrainSignal3(); // can't call the event handler directly
            // ts.OnTrainSignal4(); // can't call the event handler directly
        }
Exemple #2
0
 public Car(TrainSignal trainsignal)
 {
     trainsignal.OnTrainSignal1 += StopTheCar;
     trainsignal.OnTrainSignal2 += StopTheCar;
     trainsignal.OnTrainSignal3 += StopTheCar;
     trainsignal.OnTrainSignal4 += StopTheCarArgs;
 }