序列化中的[NonSerialized]字段 -转

我们知道我们可以添加Serializable属性来序列化和反序列化对象。它通常用来储存、传输对象。例如

[Serializable]class ShoppingCartItem{public int productId;public decimal price;public int quantity;public decimal total;public ShoppingCartItem(int _productID, decimal _price, int _quantity) { productId = _productID; price = _price; quantity = _quantity; total = price * quantity; }}

但是有时候，我们并不需要序列化所有的成员(经常动不动序列化所有的有点浪费存储空间和增加传输压力). 所以我们可以用

[NonSerialized]来标识属性、方法等。例如

[Serializable]class ShoppingCartItem{public int productId;public decimal price;public int quantity; [NonSerialized]public decimal total;public ShoppingCartItem(int _productID, decimal _price, int _quantity) { productId = _productID; price = _price; quantity = _quantity; total = price * quantity; }}

如果是这样的话, total 将不会被序列化，当然在反序列化过程中也不会被初始化，但是假如我们要在反序列化对象中得到total的结果怎么办呢？那我们就需要

IDeserializationCallback接口并实现IDeserializationCallback.OnDeserialization方法。例如

class ShoppingCartItem : IDeserializationCallback {public int productId;public decimal price;public int quantity;[NonSerialized] public decimal total;public ShoppingCartItem(int _productID, decimal _price, int _quantity){productId = _productID;price = _price;quantity = _quantity;total = price * quantity;}void IDeserializationCallback.OnDeserialization(Object sender){// After deserialization, calculate the totaltotal = price * quantity;}}

 

转载于:https://www.cnblogs.com/wupeiqi/archive/2012/11/15/2770922.html

相关资源：数据结构—成绩单生成器