static void Main(string[] args)
{
var subject = new ConcreteSubject();
var observers = new List <IObserver>
{
new ConcreteObserver(subject),
new ConcreteObserver(subject),
new ConcreteObserver(subject)
};
subject.Attach(observers[0]);
subject.Attach(observers[1]);
subject.Attach(observers[2]);
subject.SetState(12);
subject.Notify();
subject.Notify();
}
public void RunExample()
{
Console.Clear();
Console.WriteLine("Begin vanilla observer example...\n");
var subject = new ConcreteSubject();
Console.WriteLine("Creating a few random observers and attaching to the subject.");
subject.Attach(new ConcreteObserver(subject, "AbbaCabba"));
subject.Attach(new ConcreteObserver(subject, "YaddAbba"));
subject.Attach(new ConcreteObserver(subject, "MooNooGloo"));
subject.Attach(new ConcreteObserver(subject, "Virus!!!!"));
subject.Attach(new ConcreteObserver(subject, "The Last Gummy"));
Console.WriteLine("Getting the current state of the subject.");
subject.SubjectState = "Default State, nothing has changed yet.";
subject.Notify();
Console.WriteLine("Changing state...");
Console.WriteLine("Getting the current state of the subject.");
subject.SubjectState = "The state has changed!";
subject.Notify();
Console.WriteLine();
Console.WriteLine("End vanilla observer example...\n Press any key to return to main menu.");
Console.ReadKey();
Console.Clear();
}
public ConcreteObserver(ConcreteSubject subject)
{
this.subject = subject;
}
public ConcreteObserver(ConcreteSubject subject, string name)
{
_subject = subject;
_name = name;
}
