设计模式-备忘录模式

备忘录模式是，缓存动作，把上一次动作内容记下来放在缓存中

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MementoSample
{
    class Program
    {
        static void DisPlay(Pos pos)
        {
            Console.WriteLine($"当前在位置：{pos.Name}+{pos.X}+{pos.Y}");
        }
        static void Main(string[] args)
        {
            Pos mpos = new Pos("测试位置", 10, 10);
            Operater mc = new Operater();
            DisPlay(mpos);
            mc.SetMemento(mpos.Save());
            mpos.X = 20;
            DisPlay(mpos);
            mpos.Restore(mc.GetMemento());
            DisPlay(mpos);
            Console.Read();


        }
        class Pos
        {
           public  string Name;
           public int X, Y;
            public Pos(string name,int x,int y)
            {
                this.Name = name;
                X = x;
                Y = y;
            }
            internal PosMemento Save()
            {
                return new PosMemento(Name, X, Y);
            }
            internal void Restore(PosMemento pos)
            {
                this.Name = pos.Name;
                X = pos.X;
                Y = pos.Y;
            }

        }
        class PosMemento
        {
           public string Name;
           public int X, Y;
            public PosMemento (string name, int x, int y)
            {
                this.Name = name;
                X = x;
                Y = y;
            }
        }

        class Operater
        {
            private PosMemento memento;
            internal PosMemento GetMemento()
            {
                return memento;
            }
            internal void SetMemento(PosMemento memento)
            {
                this.memento = memento;
            }
        }
             
    }
}


![在这里插入图片描述](https://img-blog.csdnimg.cn/20200903192717294.png#pic_center)