观察者模式场景拓展

using System.Collections.Generic;

 

/*************************************************************************

*GUID：cab36d71-e44a-4d09-8bfd-2eef0df731ca 

*CLR：4.0.30319.17929

*Machine:  USER-KVT0SIKF25

*Author：Hollson

*Email：[email protected]

*Time：2014/3/4 12:12:52

*Code Caption：

***************************************************************************/

namespace Demo

{

    #region  气象站天气预报短信订阅服务

    interface ISmsServer

    {

        void SubScribe(ISmsClient s);

        void UnSubScribe(ISmsClient s);

        void Send(string sms);

    }

 

    public interface ISmsClient

    {

        void Receive(string sms);

    }

 

    public class SmsServer : ISmsServer

    {

        private List<ISmsClient> smss = new List<ISmsClient>();

 

        public void SubScribe(ISmsClient s)

        {

            smss.Add(s);

        }

 

        public void UnSubScribe(ISmsClient s)

        {

            if (smss.Count > 0)

            {

                smss.Remove(s);

            }

        }

 

        public void Send(string s)

        {

            foreach (var item in smss)

            {

                item.Receive(s);

            };

        }

    }

    #endregion

}

using System;

using System.Threading;

 

/*************************************************************************

*GUID：98a25f5a-15a5-4a89-ba9f-47b39be945b9 

*CLR：4.0.30319.17929

*Machine:  USER-KVT0SIKF25

*Author：Hollson

*Email：[email protected]

*Time：2014/3/4 12:13:54

*Code Caption：

***************************************************************************/

namespace Demo

{

    #region 各种对短信的操作

 

    /// <summary>

    /// 农业电视台

    /// </summary>

    public class AgricultureTV : ISmsClient

    {

        private string tv = string.Empty;

        public AgricultureTV(string tvName)

        {

            tv = tvName;

        }

        public void Receive(string sms)

        {

            Console.WriteLine(string.Format("天气预报：今天{0}_ _ {1}", sms, tv));

        }

    }

 

    /// <summary>

    /// 地理信息应用订阅短信

    /// </summary>

    public class Gis : ISmsClient

    {

        public void Receive(string sms)

        {

            Console.WriteLine("气象地图：数据已更新！");

        }

    }

 

    /// <summary>

    /// 个人订阅短信

    /// </summary>

    public class User : ISmsClient

    {

        private string usrName = string.Empty;

        public User(string usrName)

        {

            this.usrName = usrName;

        }

        public void Receive(string sms)

        {

            if (sms == "晴")

            {

                Console.WriteLine(usrName + " 说：“呵呵，今天的天气不错，出去泡妞了。。。”");

            }

        }

    }

 

    #endregion

 

    /// <summary>

    /// 演示

    /// </summary>

    public class Pro

    {

        static void Main(string[] args)

        {

            SmsServer ssr = new SmsServer();

            ssr.SubScribe(new AgricultureTV("CCTV5"));

            ssr.SubScribe(new User("张 三"));

            //ssr.SubScribe(new User("李 四"));  

            ssr.SubScribe(new Gis());

 

 

            while (true)

            {

                int r = new Random().Next(0, 3);

                if (r == 0)

                    ssr.Send("晴");

                if (r == 1)

                {

                    ssr.Send("雨");

                }

                if (r == 2)

                {

                    ssr.Send("霾");

                }

                Console.WriteLine();

                Thread.Sleep(3000);

            }

        }

    }

}