Observer Pattern

                                                                    Observer Pattern

通知者接口：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Ando.Observer
{
    public interface ISender
    {
         void Add( Observer observer);

        void Remove(Observer observer);

        void Notify();

        string  SenderInfo { get; set; }
    }
}

具体通知者：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Ando.Observer
{
   public class ConcreteSender:ISender
    {
       private  IList<Observer>  observerList=new List<Observer>();

       public void Add(Observer observer)
       {
           observerList.Add(observer);
       }

       public void Remove(Observer observer)
       {
           observerList.Remove(observer);
       }

       public void Notify()
       {
           foreach (Observer observer in observerList)
           {
               observer.Update();
           }
       }

       public string SenderInfo { get; set; }
    }
}

抽象接收者：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.AccessControl;
using System.Text;

namespace Ando.Observer
{
    public abstract class Observer
    {
        protected string Name;
        protected ISender Sender;

        protected Observer(string name, ISender sender)
        {
            this.Name = name;
            this.Sender = sender;
        }

        public abstract void Update();

    }
}

具体接收者：

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;

namespace Ando.Observer
{
    public class ConcreteObserver : Observer
    {
        public ConcreteObserver(string name, ISender sender)
            : base(name, sender)
        {
        }

        public override void Update()
        {
            Console.WriteLine("{0} {1},", Sender.SenderInfo, Name);
            //Console.ReadKey();
        }
    }
}

主函数代码：

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using Ando.Observer;

namespace MainObserver
{
    class Program
    {
        static void Main(string[] args)
        {
            ConcreteSender security = new ConcreteSender();
            ConcreteObserver workMate=new ConcreteObserver("Ando",security);
            ConcreteObserver workMate1=new ConcreteObserver("Sweet",security);
            security.Add(workMate);
            security.Add(workMate1);
            security.SenderInfo = "写代码的速度给我加快点！";
            security.Notify();
           Console.WriteLine("~~~啦啦啦，Ando 成功写出了一个观察者模式~~~");
            Console.ReadKey();
        }
    }
}

效果：