asp.net 委托

asp.net 委托

我的直接感觉：1、客户代码做委托的决策者

　　　　　　　2、在A处定义，在B处实现

 示例代码

    [Serializable]
    public class Parents
    {
        public void GetMilk(object sender, ParentName e)
        {
            Baby b = (Baby)sender;
            Console.WriteLine("孩子别哭，{0}拿奶给你喝", b.ParentName);
        }

        public void ChangeDiapers(object sender, ParentName e)
        {
            Baby b = (Baby)sender;
            Console.WriteLine("孩子真小，别怕，{0}帮你换尿布了", e.Name);
        }
    }

    [Serializable]
    public class ParentName : EventArgs
    {
        string name;
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
    }

    [Serializable]
    public class Baby
    {
        public delegate void BabyEventHandler(object sender, ParentName e);
        public event BabyEventHandler BabyEvent;

        #region 属性
        ParentName _p = new ParentName();
        public string ParentName
        {
            get { return _p.Name; }
            set { _p.Name = value; }
        }

        string _BabyName;
        public string BabyName
        {
            get { return _BabyName; }
            set { _BabyName = value; }
        }
        #endregion

        public void Cry()
        {
            if (BabyEvent != null)
            {
                ParentName e = new ParentName();
                e.Name = this.ParentName;
                BabyEvent(this, e);
            }
        }

        /// <summary>
        /// baby大便
        /// </summary>
        public void Stool()
        {
            if (BabyEvent == null)
                return;

            ParentName e = new ParentName();
            e.Name = this.ParentName;
            BabyEvent(this, e);
        }

        /// <summary>
        /// 深拷贝
        /// </summary>
        /// <returns></returns>
        private Baby DeepClone()
        {
            Baby b;
            MemoryStream memoryStream = new MemoryStream();
            BinaryFormatter formatter = new BinaryFormatter();
            formatter.Serialize(memoryStream, this);
            memoryStream.Position = 0;
            b = (Baby)formatter.Deserialize(memoryStream);
            return b;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="t"></param>
        /// <returns></returns>
        public Baby Clone(bool t)
        {
            if (t)
            {
                return DeepClone();
            }
            else
            {
                return (Baby)this.MemberwiseClone();
            }
        }
    }

 

客户代码：

Parents p = new Parents();
Baby b1 = new Baby();

b1.ParentName = "老爸";
b1.BabyEvent += new Baby.BabyEventHandler(p.GetMilk);
b1.Cry();
b1.BabyEvent -= new Baby.BabyEventHandler(p.GetMilk);

b1.ParentName = "老妈";
b1.BabyEvent += new Baby.BabyEventHandler(p.ChangeDiapers);
b1.Stool();

 

 显示结果：

孩子别哭，老爸拿奶给你喝

孩子真小，老妈给你换尿布