Decorator Pattern屬于Structural Patterns

介紹：

Decorator pattern的作用是提供一種方式動態的給一個對象添加新的職責或狀態，被裝飾的對象并不知道被“裝飾”了。A key implementation point in the Decorator pattern is that decorators both inherit the original class and contain an instantiation of it.

實現：

UML 類圖

public interface IComponent{string Operation();}/// <summary>/// 被裝飾者/// </summary>public class Component : IComponent{#region IComponent Memberspublic string Operation(){return "I'm a photo;";}#endregion}/// <summary>/// 裝飾者A/// </summary>public class DecoratorA : IComponent{IComponent component;public DecoratorA(IComponent component){this.component = component;}#region IComponent Memberspublic string Operation(){return component.Operation() + "and decorated by DecoratorA";}#endregion}/// <summary>/// 裝飾者B/// </summary>public class DecoratorB : IComponent{IComponent component;public string AddedState = " and added state";public DecoratorB(IComponent component){this.component = component;}#region IComponent Memberspublic string Operation(){return component.Operation() + "and decorated by DecoratorB";}public string AddedBehavior(){return " and added behavior by DecoratorB";}#endregion}public class Client{public static void Display(string s, IComponent component){Console.WriteLine(s + component.Operation());}}[TestFixture]public class DecoratorTest{[Test]public void T1(){var component = new Component();Client.Display(string.Empty, component);var decoratorB = new DecoratorB(component);Client.Display("hello!", decoratorB);}}

轉載于:https://www.cnblogs.com/dushouke/archive/2012/03/16/2400274.html

總結

以上是生活随笔為你收集整理的Decorator Pattern - C# 3.0 Design Patterns的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。