static void Main(string[] args)
{
ConcreteSubject subject = new ConcreteSubject();
ConcreteObserverA observerA1 = new ConcreteObserverA(subject, "observer1");
ConcreteObserverA observerA2 = new ConcreteObserverA(subject, "observer2");
subject.Attach(observerA1);
subject.Attach(observerA2);
subject.SubjectState = "Hello";
subject.Notify();
subject.SubjectState = "World";
subject.Notify();
}
public void TestMethod1()
{
ConcreteSubject subject = new ConcreteSubject();
subject.Attach(new ConcreteObserver(subject, "Observer 1"));
subject.Attach(new ConcreteObserver(subject, "Observer 2"));
subject.Attach(new ConcreteObserver(subject, "Observer 3"));
subject.State = "State 1";
subject.Notify();
subject.State = "State 2";
subject.Notify();
}
/// <summary>
/// Entry point into console application.
/// </summary>
public static void Demonstrate()
{
// Configure Observer pattern
ConcreteSubject s = new ConcreteSubject();
s.Attach(new ConcreteObserver(s, "X"));
s.Attach(new ConcreteObserver(s, "Y"));
s.Attach(new ConcreteObserver(s, "Z"));
// Change subject and notify observers
s.SubjectState = "ABC";
s.Notify();
// Wait for user
Console.ReadKey();
}