深拷贝与浅拷贝

 

在C#中的ICloneable中给出的Clone方法只是一个模棱两可的方法，并不足以实现深拷贝和浅拷贝。

 

深拷贝：

 

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using(Stream objectStream = new MemoryStream()) { IFormatter formatter = new BinaryFormatter(); formatter.Serialize(objectStream, this); objectStream.Seek(0, SeekOrigin.Begin); return formatter.Deserialize(objectStream) as Test; }

 

使用using开出一段流，将对象序列化。这里没有成功，有兴趣的可以试下。

 

 

深拷贝与浅拷贝的根本区别就在于：是否拷贝的是值还是地址。

浅拷贝是两个对象指向同一片地址。

深拷贝是两个对象两个完全不同的地址，但是里面的内容一样。

我的思路是：A类中的字段是B类的对象。直接拷贝A类中的属性，属性是字段的话，重新申明一个B类对象，将A类中B的对象里的拷贝进去。

 

class Number
    {
        public string number { get; set; }

        public override string ToString()
        {
            return this.number;
        }
        public Number()
        {
            this.number = string.Empty;
        }

        public void NumberClone(Number num)
        {
            this.number = num.number;
        }
    }

 在这里，属性不能自己调用自己。如果调用则会陷入死循环。

 public Number CabinetNumber
{
　　get{ return CabinetNumber;}
　　set{ }
}

class Cabinet
    {
        public int No { get; set; }
        public int Side { get; set; }
        public string Name { get; set; }

        private Number _number;
        public Number CabinetNumber
        {
            //get; set;
            get
            {
                if (_number == null)
                {
                    _number = new Number();
                }
                return _number;
            }
            set { }
        }

        public void CreateCabinet(Cabinet cabinet)
        {
            this.No = cabinet.No;
            this.Side = cabinet.Side;
            this.Name = cabinet.Name;
            Console.WriteLine("this.GetHashCode: " + this.GetHashCode());
            Console.WriteLine();
        }
        public Cabinet CreateCabinetNumber(Cabinet cabinet)
        {
            //this.No = cabinet.No;
            //this.Side = cabinet.Side;
            //this.Name = cabinet.Name;
            //this.CabinetNumber.NumberClone(cabinet.CabinetNumber);
            Cabinet cabinetNum = new Cabinet() { CabinetNumber = new Number { } };
            cabinetNum.No = cabinet.No;
            cabinetNum.Side = cabinet.Side;
            cabinetNum.Name = cabinet.Name;
            cabinetNum.CabinetNumber.NumberClone(cabinet.CabinetNumber);

            Console.WriteLine("CreateCabinetNumber里clone: ");
            Console.WriteLine("this.GetHashCode: " + cabinetNum.GetHashCode());
            Console.WriteLine("this.CabinetNumber.GetHashCode: " + cabinetNum.CabinetNumber.GetHashCode());
            Console.WriteLine();
            return cabinetNum;
        }
        public override string ToString()
        {
            if (this.CabinetNumber == null)
            {
                return string.Format("{0},{1},{2}", this.No, this.Name, this.Side);
            }
            return string.Format("{0},{1},{2},{3}", this.No, this.Name, this.Side, this.CabinetNumber.ToString());
        }
    }

主程序代码：

            Console.WriteLine("-----CabinetNumber----");
            Cabinet cabinetNum = new Cabinet() { No = 12, Name = "cabinet01", Side = 12, CabinetNumber = new Number() { number = "num01" } };
            Cabinet cabinetNumClone = new Cabinet() { CabinetNumber = new Number() };
            Console.WriteLine("cabinetNum.GetHashCode: " + cabinetNum.GetHashCode());
            Console.WriteLine("cabinetNumClone.GetHashCode: " + cabinetNumClone.GetHashCode());
            Console.WriteLine();

            Console.WriteLine("cabinetNum.CabinetNumber.GetHashCode: " + cabinetNum.CabinetNumber.GetHashCode());
            //Console.WriteLine("cabinetNumClone.CabinetNumber.GetHashCode: " + cabinetNumClone.CabinetNumber.GetHashCode());
            Console.WriteLine();
            Console.WriteLine("--测试---");
            //cabinetNumClone = Cabinet.CreateCabinetNumber(cabinetNum);
            cabinetNumClone = cabinetNumClone.CreateCabinetNumber(cabinetNum);


            Console.WriteLine("cabinetNum.CabinetNumber.GetHashCode: " + cabinetNum.CabinetNumber.GetHashCode());
            Console.WriteLine("cabinetNumClone.CabinetNumber.GetHashCode: " + cabinetNumClone.CabinetNumber.GetHashCode());
            Console.WriteLine();

            Console.WriteLine("cabinetNum: " + cabinetNum.ToString());
            Console.WriteLine("cabinetNumClone: " + cabinetNumClone.ToString());
            Console.WriteLine();

            Console.WriteLine("-----改变cabinetNumClone------");
            cabinetNumClone.CabinetNumber.number = "num01Clone";
            cabinetNumClone.Name = "cabinetClone";
            Console.WriteLine("cabinetNum.GetHashCode: " + cabinetNum.GetHashCode());
            Console.WriteLine("cabinetNumClone.GetHashCode: " + cabinetNumClone.GetHashCode());
            Console.WriteLine();

            Console.WriteLine("cabinetNum.CabinetNumber.GetHashCode: " + cabinetNum.CabinetNumber.GetHashCode());
            Console.WriteLine("cabinetNumClone.CabinetNumber.GetHashCode: " + cabinetNumClone.CabinetNumber.GetHashCode());
            Console.WriteLine();
            Console.WriteLine("cabinetNum: " + cabinetNum.ToString());
            Console.WriteLine("cabinetNumClone: " + cabinetNumClone.ToString());