public Main()
{
//create the subject
var s1 = new ConcreteSubject();
//version 1 -
//create the observer
//the data is passed during notification.
var o3 = new ConcreteObserver();
var o4 = new ConcreteObserver();
//version 2 -
//create the observer and pass the subject
//to pull the requiered data after a change.
var o1 = new ConcreteObserver(s1);
var o2 = new ConcreteObserver(s1);
//Attach observers , only version 1
s1.Add(o3);
s1.Add(o4);
//Perform a change of state.
s1.ID = 1;
s1.ID = 3;
}
private static void HandleObserver()
{
ISubject subject = new ConcreteSubject();
IObserver observer = new ConcreteObserver1(subject, "观察者1");
IObserver observer2 = new ConcreteObserver1(subject, "观察者2");
subject.Add(observer);
subject.Add(observer2);
subject.SutjectState = "服务器崩溃了!";
subject.Notify();
Console.Read();
}
public static void Main_Observer()
{
var sub1 = new ConcreteSubject();
var ob1 = new ConcreteObserver1();
var ob2 = new ConcreteObserver1();
//添加观察者
sub1.Add(ob1);
sub1.Add(ob2);
sub1.Notify("New Msg");
sub1.Renmove(ob2);
Console.ReadLine();
}
public static void Observer()
{
ConcreteSubject cs = new ConcreteSubject();
ConcreteObserver co1 = new ConcreteObserver("Observer 1");
ConcreteObserver co2 = new ConcreteObserver("Observer 2");
ConcreteObserver co3 = new ConcreteObserver("Observer 3");
cs.Add(co1);
cs.Add(co2);
cs.Add(co3);
cs.Notify();
Console.Read();
}
