一、實(shí)現(xiàn)深拷貝方法
using System.IO;using System.Runtime.Serialization;namespace DeepCopyExp{ class DeepCopy { public static T DeepCopyByDCS<T>(T obj) { T newObject; using (MemoryStream memoryStream = new MemoryStream()) { DataContractSerializer dcs = new DataContractSerializer(obj.GetType()); dcs.WriteObject(memoryStream, obj); memoryStream.Seek(0, SeekOrigin.Begin); newObject = (T)dcs.ReadObject(memoryStream); } return newObject; } }}二、測(cè)試深拷貝方法
2.1 書寫測(cè)試代碼
using System;namespace DeepCopyExp{ class Program { static void Main(string[] args) { Student s = new Student() { Id = 1, Name = "三五月兒", Score = new Score() { ChineseScore =100, MathScore=100} }; Student s1 = DeepCopy.DeepCopyByDCS(s); Console.WriteLine("Id = {0}, Name = {1}, Score.ChineseScore = {2}, Score.MathScore = {3}", s1.Id, s1.Name, s1.Score.ChineseScore, s1.Score.MathScore); } } public class Score { public int ChineseScore { get; set; } public int MathScore { get; set; } } public class Student { public int Id { get; set; } public string Name { get; set; } public Score Score { get; set; } }}代碼中先實(shí)例化Student類得到對(duì)象s，再使用本文給出的拷貝方法將其拷貝至對(duì)象s1并輸出s1的內(nèi)容，s1的內(nèi)容是不是和s的內(nèi)容完全一致？
2.2 運(yùn)行測(cè)試代碼得到下圖所示結(jié)果
圖1 程序執(zhí)行結(jié)果
從結(jié)果了解到，s與s1的內(nèi)容完全一致。
三、真的是深拷貝嗎
為了驗(yàn)證這點(diǎn)，在代碼Student s1 = DeepCopy.DeepCopyByDCS(s);的后面加入以下代碼：
s.Id = 2;s.Name = "sanwuyueer";s.Score = new Score() { ChineseScore = 0, MathScore = 0 };使用這些代碼修改對(duì)象s的值后再次輸出對(duì)象s1的值，發(fā)現(xiàn)s1的內(nèi)容并沒有發(fā)生改變，說明s1是一個(gè)與s無關(guān)的新對(duì)象，確實(shí)是深拷貝。
四、DataContractSerializer類實(shí)現(xiàn)深拷貝的原理
先使用DataContractSerializer類的實(shí)例方法WriteObject將對(duì)象的完整內(nèi)容寫入流，再使用實(shí)例方法ReadObject讀取流內(nèi)容并生成反序列化的對(duì)象。
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