/// <summary>
/// Entry point into console application.
/// </summary>
static void Main()
{
// 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();
}
/// <summary>
/// Entry point into console application.
/// </summary>
public static void Main()
{
// 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();
}
public void Test()
{
var subject = new ConcreteSubject();
var observer1 = new ConcreteObserver1();
var observer2 = new ConcreteObserver2();
subject.Register(observer1);
subject.Register(observer2);
Assert.That(subject.Property1, Is.Null);
Assert.That(observer1.Property1, Is.Null);
Assert.That(subject.Property2, Is.Null);
Assert.That(observer2.Property2, Is.Null);
subject.Property1 = "property 1";
Assert.That(subject.Property1, Is.EqualTo("property 1"));
Assert.That(observer1.Property1, Is.EqualTo("property 1"));
Assert.That(subject.Property2, Is.Null);
Assert.That(observer2.Property2, Is.Null);
subject.Property2 = "property 2";
Assert.That(subject.Property1, Is.EqualTo("property 1"));
Assert.That(observer1.Property1, Is.EqualTo("property 1"));
Assert.That(subject.Property2, Is.EqualTo("property 2"));
Assert.That(observer2.Property2, Is.EqualTo("property 2"));
subject.Unregister(observer1);
subject.Property1 = "PROPERTY 1";
Assert.That(subject.Property1, Is.EqualTo("PROPERTY 1"));
Assert.That(observer1.Property1, Is.EqualTo("property 1"));
Assert.That(subject.Property2, Is.EqualTo("property 2"));
Assert.That(observer2.Property2, Is.EqualTo("property 2"));
subject.Property2 = "PROPERTY 2";
Assert.That(subject.Property1, Is.EqualTo("PROPERTY 1"));
Assert.That(observer1.Property1, Is.EqualTo("property 1"));
Assert.That(subject.Property2, Is.EqualTo("PROPERTY 2"));
Assert.That(observer2.Property2, Is.EqualTo("PROPERTY 2"));
}
public ConcreteObserver(ConcreteSubject subject, string name)
{
Subject = subject;
_name = name;
}
public ConcreteObserver(ConcreteSubject subject, string name)
{
this._subject = subject;
this._name = name;
}
// Constructor
public ConcreteObserver(
ConcreteSubject subject, string name)
{
this._subject = subject;
this._name = name;
}