//将MailManager对象传给构造器
public Fax(MailManager mm)
{
//构造EventHandler<NewMailEventArgs>委托的一个实例
//使用它引用我们的FaxMsg回调方法
//向MailManager的NewMail事件登记我们的回调方法
mm.NewMail += FaxMsg;
}
public void Unregister(MailManager mm)
{
mm.NewMail -= FaxMsg;
}
private static void Main(string[] args)
{
Console.WriteLine("------");
//
// MailManager mm = new MailManager();
//
// Fax fax = new Fax(mm);
// CellPhone pager = new CellPhone(mm);
//
// mm.SimulateArrivingMsg("Google", "Me", "CV", "how are you");
//
// fax.Unregister(mm);
//
// mm.SimulateArrivingMsg("Amdaris", "Me", "ID", "check your account");
///////////////////
// // Construct a MailPublisher object
// MailManager mm2 = new MailManager();
//
// // Construct a Fax object
// Fax fax2 = new Fax(mm2);
//
// // Construct a CellPhone object
// CellPhone phone2 = new CellPhone(mm2);
//
// //Register weak events by WeakEventManager
//
// WeakEventManager<MailManager, NewMailEventArgs>.
// AddHandler(mm2, "SimulateArrivingMsg", fax2.FaxMsg);
//
// //mm2.SimulateArrivingMsg("Google", "Me", "CV", "how are you");
//
// //fax2.Unregister(mm2);
//
// WeakEventManager<MailManager, NewMailEventArgs>.
// AddHandler(mm2, "NewMail", phone2.PhoneMsg);
//
//
// //mm2.SimulateArrivingMsg("Google", "Me", "CV", "how are you");
//
// // Unregister weak event for the Fax object by WeakEventManager
// WeakEventManager<MailManager, NewMailEventArgs>.RemoveHandler(mm2, "NewMail", fax2.FaxMsg);
// Construct a MailPublisher object
MailManager mm = new MailManager();
// Construct a Fax object
Fax fax = new Fax();
// Construct a CellPhone object
CellPhone phone = new CellPhone();
//Register weak events by WeakEventManager fax
Console.WriteLine("========= fax.msg=============");
WeakEventManager <MailManager, NewMailEventArgs> .
AddHandler(mm, "NewMail", fax.FaxMsg);
mm.SimulateArrivingMsg("Google", "Me", "CV", "how are you");
Console.WriteLine("=============================");
Console.WriteLine("========= fax.msg, phone.msg=============");
WeakEventManager <MailManager, NewMailEventArgs> .
AddHandler(mm, "NewMail", phone.PhoneMsg);
mm.SimulateArrivingMsg("Amdaris", "Me", "ID", "check your account");
Console.WriteLine("=============================");
// Unregister weak event for the Fax object by WeakEventManager
WeakEventManager <MailManager, NewMailEventArgs> .
RemoveHandler(mm, "NewMail", fax.FaxMsg);
WeakEventManager <MailManager, NewMailEventArgs> .
RemoveHandler(mm, "NewMail", phone.PhoneMsg);
Console.ReadKey();
}