C# (CSharp) OnlineShoppingCenter NewProductSubject示例

示例#1

        static void Main(string[] args)
        {
            var subject   = new NewProductSubject();
            var observerA = new Customer1();

            subject.Attach(observerA);

            var observerB = new Customer2();

            subject.Attach(observerB);

            subject.DiscountOnTheNewProduct();
            subject.DiscountOnTheNewProduct();

            subject.Detach(observerB);

            subject.DiscountOnTheNewProduct();
        }

示例#2

        public ObserverPatternStrategy()
        {
            var subject   = new NewProductSubject();
            var observerA = new Customer1();

            subject.Attach(observerA);

            var observerB = new Customer2();

            subject.Attach(observerB);

            subject.DiscountOnTheNewProduct();
            subject.DiscountOnTheNewProduct();

            subject.Detach(observerB);

            subject.DiscountOnTheNewProduct();
        }