C#设计模式- 观察者模式（4）

来源：互联网发布：小型公司网络搭建编辑：程序博客网时间：2024/05/24 03:30
using System;using System.Collections.Generic;using System.Text;namespace 观察者模式{    class Program    {        static void Main(string[] args)        {            //老板胡汉三            Boss huhansan = new Boss();            //看股票的同事            StockObserver tongshi1 = new StockObserver("魏关姹", huhansan);            //看NBA的同事            NBAObserver tongshi2 = new NBAObserver("易管查", huhansan);            huhansan.Attach(tongshi1);            huhansan.Attach(tongshi2);            huhansan.Detach(tongshi1);            //老板回来            huhansan.SubjectState = "我胡汉三回来了！";            //发出通知            huhansan.Notify();            Console.Read();        }    }    //通知者接口    interface Subject    {        void Attach(Observer observer);        void Detach(Observer observer);        void Notify();        string SubjectState        {            get;            set;        }    }    class Secretary : Subject    {        //同事列表        private IList<Observer> observers = new List<Observer>();        private string action;        //增加        public void Attach(Observer observer)        {            observers.Add(observer);        }        //减少        public void Detach(Observer observer)        {            observers.Remove(observer);        }        //通知        public void Notify()        {            foreach (Observer o in observers)                o.Update();        }        //前台状态        public string SubjectState        {            get { return action; }            set { action = value; }        }    }    class Boss : Subject    {        //同事列表        private IList<Observer> observers = new List<Observer>();        private string action;        //增加        public void Attach(Observer observer)        {            observers.Add(observer);        }        //减少        public void Detach(Observer observer)        {            observers.Remove(observer);        }        //通知        public void Notify()        {            foreach (Observer o in observers)                o.Update();        }        //老板状态        public string SubjectState        {            get { return action; }            set { action = value; }        }    }    //抽象观察者    abstract class Observer    {        protected string name;        protected Subject sub;        public Observer(string name, Subject sub)        {            this.name = name;            this.sub = sub;        }        public abstract void Update();    }    //看股票的同事    class StockObserver : Observer    {        public StockObserver(string name, Subject sub)            : base(name, sub)        {        }        public override void Update()        {            Console.WriteLine("{0} {1} 关闭股票行情，继续工作！", sub.SubjectState, name);        }    }    //看NBA的同事    class NBAObserver : Observer    {        public NBAObserver(string name, Subject sub)            : base(name, sub)        {        }        public override void Update()        {            Console.WriteLine("{0} {1} 关闭NBA直播，继续工作！", sub.SubjectState, name);        }    }}
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