序列化

序列化

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1.什么是“序列化”？

2.简单序列化实例？

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1.什么是“序列化”？

http://msdn.microsoft.com/en-us/library/7ay27kt9(v=VS.71).aspx

Serialization is the process of converting the state of an object into a form that can be persisted or transported. The complement of serialization is deserialization, which converts a stream into an object. Together, these processes allow data to be easily stored and transferred.Serialization提供一种讲一个class持久化的能力。

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2.简单序列化实例？

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Runtime.Serialization.Formatters.Binary; using System.IO; using System.Runtime.Serialization; namespace SerializationTest { [Serializable] public class SumOf : IDeserializationCallback { private int startNumber = -1; private int endNumber; [NonSerialized] private int[] theSums; private void Serialize() { Console.WriteLine("Serializing ..."); FileStream fileStream = new FileStream("DoSum.out", FileMode.Create); BinaryFormatter binaryFomatter = new BinaryFormatter(); binaryFomatter.Serialize(fileStream, this); Console.WriteLine("...Completed"); fileStream.Close(); } public static SumOf Deserialize() { FileStream fileStream = new FileStream("DoSum.out", FileMode.Open); BinaryFormatter binaryFomatter = new BinaryFormatter(); SumOf retVal = (SumOf)binaryFomatter.Deserialize(fileStream); fileStream.Close(); return retVal; } public SumOf(int start, int end) { this.startNumber = start; this.endNumber = end; this.ComputeSums(); this.Serialize(); } private void ComputeSums() { int count = this.endNumber - this.startNumber + 1; this.theSums = new int[count]; theSums[0] = startNumber; for (int i = 1, j = startNumber + 1; i < count; ++i, ++j ) { theSums[i] = j + theSums[i - i]; } } public void DisplaySums() { foreach (int num in this.theSums) { Console.WriteLine("{0} ", num); } } public void OnDeserialization(object sender) { this.ComputeSums(); } } }

上面的代码中需要注意：

1.添加Serializable标记，显式表明该类能够序列化

2.如果类中的某个成员处于性能等考虑的话， 不想被序列化，需要标记NonSerialized

[NonSerialized] private int[] theSums;

3.如果表明某个对象不被序列化，那么在反序列化生成的对象中该属性是theSums空的。如果想要在反序列化之后重新初始化这些数据，需要实现IDeserializationCallback接口，在这里仅仅是重新计算sums。

public void OnDeserialization(object sender) { this.ComputeSums(); }

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