03_装饰模式

垮裤

+ 展示形象()

服饰

Decorator

Component Component;

+Operation()

internal class ConcreteComponent : Component { public override void Operation() { Console.WriteLine(\"具体对象的操作\"); } }

领带

ConcreteDecoratorA

AddedState;

Component

internal abstract class Decorator : Component { protected Component Component; public void SetComponent(Component component) { Component = component; } public override void Operation() { if (Component != null) { Component.Operation(); } } }

T恤

皮鞋

static void Main(string[] args) { var component = new ConcreteComponent(); var decoratorA = new ConcreteDecoratorA(); var decoratorB = new ConcreteDecoratorB(); decoratorA.SetComponent(component); decoratorB.SetComponent(decoratorA); decoratorB.Operation(); Console.Read(); }

internal class ConcreteDecoratorA : Decorator { public string AddedState; public override void Operation() { base.Operation(); AddedState = \"New State\"; Console.WriteLine(\"具体装饰对象A的操作\"); } }

人

ConcreteDecoratorB

+Operation()+AddedBehavior()

西服

internal class ConcreteDecoratorB : Decorator { public override void Operation() { base.Operation(); AddedBehavior(); Console.WriteLine(\"具体装饰对象B的操作\"); } private void AddedBehavior() { } }

示例：

ConcreteComponent

+ Operation()

输出

internal abstract class Component { public abstract void Operation(); }