static void Main11(string[] args)
{
ListenerOne listener = new ListenerOne();
SenderBase sb = new SenderBase();
SenderChild sc = new SenderChild();
listener.Register(sb);
listener.Register(sc);
string s = "It comes!";
int i = 100;
sb.SomethingHappens(i, s);
sc.SomethingHappens(i, s);
listener.Unregister(sb);
listener.Unregister(sc);
ManyEventsClass mec = new ManyEventsClass();
mec.e1 += TempHandleMany_1; //背后的实现是自定义的, 而不是默认自动生成的event+=
mec.e2 += TempHandleMany_2;
mec.e3 += TempHandleMany_3;
mec.Happen1();
mec.Happen2(i, s);
//mec.Happen3();
}
public void Unregister(SenderBase sb)
{
//不用担心删除一个没添加过的方法, 最终调用Delegate.Remove方法在这种情况只是什么也不做
sb.myEvent -= EventHandlerOne;
}
//Listener提供让自己注册和取消监听事件的方法
public void Register(SenderBase sb)
{
sb.myEvent += EventHandlerOne;
}