[3.22] delegate chain (Multicast delegate)

using System;
using System.Collections.Generic;

namespace Study09
{
    public class CarDriver
    {
        public CarDriver()
        {

        }

        public static void GoLeft()
        {
            Console.WriteLine("GoLeft");
        }

        public static void GoForward()
        {
            Console.WriteLine("GoForward");
        }
    }

    public class App
    {
        //대리자 선언
        public delegate void GoHome();
        public delegate void Say();
        public App()
        {
            //대리자 변수 선언 및 초기화
            GoHome go = new GoHome(CarDriver.GoLeft);
            go += new GoHome(CarDriver.GoForward);
            go -= new GoHome(CarDriver.GoLeft);

            go();

            Say say = new Say(Hi);
            say += new Say(Hello);

            say();
            say -= new Say(Hello);
            say();
        }

        private void Hello()
        {
            Console.WriteLine("Hello");
        }
        private void Hi()
        {
            Console.WriteLine("Hi");
        }
    }
}

 

using System;

namespace Study09
{
    public class App
    {
        public delegate void SendMessage(string message);
        public App()
        {
            SendMessage del1 = this.Hello;
            SendMessage del2 = this.Hi;

            del1("홍길동");
            del2("임꺽정");
            Console.WriteLine("===================================");

            //멀티캐스트를 통한 초기화
            SendMessage del = del1 + del2;
            del("장길산");
            Console.WriteLine("===================================");

            SendMessage del3 = (string name) =>
            {
                Console.WriteLine("안녕하세요, {0}님", name);
            };

            del += del3;
            del("고길동");
            Console.WriteLine("===================================");

            del -= del2;
            del("둘리"); 
            Console.WriteLine("===================================");

            del -= del1;
            del("도우너");
        }

        public void Hello(string name)
        {
            Console.WriteLine("Hello {0}", name);
        }
        public void Hi(string name)
        {
            Console.WriteLine("Hi {0}", name);
        }
    }
}

 

using System;

namespace Study09
{
    public class App
    {
        public delegate void ThereIsFire(string location);
        public App()
        {
            ThereIsFire fire = Call119;
            fire += ShotOut;
            fire += Escape;

            fire("우리집");
        }

        public void Call119(string location)
        {
            Console.WriteLine("소방서죠? 불났어요! 주소는 {0}", location);
        }

        public void ShotOut(string location)
        {
            Console.WriteLine("피하세요! {0}에 불났어요!", location);
        }

        public void Escape(string location)
        {
            Console.WriteLine("{0}에서 나갑니다!", location);
        }
    }
}