概述动态为对象添加额外的功能，相对以前利用子类继承来增加父类的功能来说。装饰模式更为简洁、灵活，更符合面向
在Decorator类中，通过SetComponent构造函数来对Component对象进行设置，从而扩展Component的功能，
namespace 装饰模式
{
class Program
{
static void Main(string[] args)
{
ConcreteComponent c = new ConcreteComponent();
ConcreteDecoratorA a = new ConcreteDecoratorA();
ConcretedDecoratorB b = new ConcretedDecoratorB();
a.SetComponent(c);
b.SetComponent(a);
b.Operation();
Console.ReadLine();
}
}
//Component类
abstract class Component
{
public abstract void Operation();
}
//ConcreteComponet类
class ConcreteComponent : Component
{
public override void Operation()
{
Console.WriteLine("具体对象的操作！！！") ;
}
}
//Decorator类
abstract class Decorator : Component
{
//设置Component
protected Component component;
public void SetComponent (Component component)
{
this.component = component;
}
public override void Operation()
{
if (component != null)
{
component.Operation();
}
}
}
//ConcreteDecoratorA类
class ConcreteDecoratorA :Decorator
{
private string addedState;
public override void Operation()
{
base.Operation();
addedState = "标识A的操作，以区别操作B！！！";
Console.WriteLine ("具体对象A的操作！！！");
}
}
//ConcreteDecoratorB类
class ConcretedDecoratorB : Decorator
{
private string removeState;
public override void Operation()
{
base.Operation();
removeState = "标识操作B，以区别操作A！！！";
Console.WriteLine("具体对象B的操作！！！");
}
}
}
运行结果 |
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来自： 昵称10504424 > 《架构设计》
