Observer Pattern
Posted 杜少
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Observer Pattern
通知者接口:
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace Ando.Observer 7 { 8 public interface ISender 9 { 10 void Add( Observer observer); 11 12 void Remove(Observer observer); 13 14 void Notify(); 15 16 string SenderInfo { get; set; } 17 } 18 }
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:
1 using System; 2 using System.Collections.Generic; 3 using System.Globalization; 4 using System.Linq; 5 using System.Text; 6 7 namespace Ando.Observer 8 { 9 public class ConcreteObserver : Observer 10 { 11 public ConcreteObserver(string name, ISender sender) 12 : base(name, sender) 13 { 14 } 15 16 public override void Update() 17 { 18 Console.WriteLine("{0} {1},", Sender.SenderInfo, Name); 19 //Console.ReadKey(); 20 } 21 } 22 }
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:
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