【C#】Behavioral Patterns Memento Mode

The Memento design pattern without violating encapsulation, captures and externalizes an object‘s internal state so that the object can be restored to this state later.

备忘录模式让程式能捕获外部的变化并改变内部的状态，有点像是游戏读取存档的功能~

学习目标: 备忘录模式的概念及实务

学习难度: ☆☆☆

using System;namespace ConsoleApp1{    public class Player    {        int money;        public int Money        {            get { return money; }            set            {                money = value;                Console.WriteLine("Player's Money = " + money);            }        }        public Memento CreateMemento()        {            return (new Memento(money));        }        public void SetMemento(Memento memento)        {            Console.WriteLine("Return to last data...");            Money = memento.Money;        }    }    public class Memento    {        int money;        public Memento(int money)        {            this.money = money;        }        public int Money        {            get { return money; }        }    }    public class Storage    {        Memento memento;        public Memento Memento        {            set { memento = value; }            get { return memento; }        }    }    public class MainProgram    {        public static void Main(string[] args)        {            Player player = new Player();            player.Money = 100;            Storage storage = new Storage();            storage.Memento = player.CreateMemento();            player.Money = 50;            player.SetMemento(storage.Memento);        }    }}

参考资料:

https://www.dofactory.com/net/memento-design-pattern