设计模式——装饰器模型

1.创建基础类

 /// <summary>
    ///抽象的女朋友
    /// </summary>
    public abstract class AbstractGirlFriend
    {
        public int Id { get; set; }
        public string Name { get; set; }

        /// <summary>
        /// 化妆
        /// </summary>
        public abstract void MakeUp();
    }

/// <summary>
    /// 装饰器：组合+继承
    /// </summary>
    public class BaseGirlFrienDecorator : AbstractGirlFriend
    {

        private AbstractGirlFriend _GirlFriend = null;//用了组合加override
        public BaseGirlFrienDecorator(AbstractGirlFriend girlFriend)
        {
            this._GirlFriend = girlFriend;
        }

        public override void MakeUp()
        {
            this._GirlFriend.MakeUp();
            //Console.WriteLine("****************");
            //基类装饰器必须是个空的行为  会重复
        }

    }

2.继承

 /// <summary>
    /// 睫毛
    /// </summary>
    public class GirlFrienEyelashDecorator : BaseGirlFrienDecorator
    { 
        public GirlFrienEyelashDecorator(AbstractGirlFriend girlFriend)
             : base(girlFriend)//表示父类的构造函数
        {

        }

        /// <summary>
        /// 睫毛
        /// </summary>
        public override void MakeUp()
        { 
            base.MakeUp();
            Console.WriteLine("整理睫毛...");
        }

    }

3.调用

  abstractGirlFriend = new BaseGirlFrienDecorator(abstractGirlFriend);
                //abstractGirlFriend.MakeUp(); 
                abstractGirlFriend = new GirlFrienEyelashDecorator(abstractGirlFriend);
abstractGirlFriend.MakeUp();