例说C#深拷贝与浅拷贝

本文主要是介绍例说C#深拷贝与浅拷贝，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一开始，先对C#深拷贝与浅拷贝知识做个简单的总结。

无论是浅拷贝与深拷贝，C#都将源对象中的所有字段复制到新的对象中。不过，对于值类型字段，引用类型字段以及字符串类型字段的处理，两种拷贝方式存在一定的区别（见下表）。

下面给出完整的演示代码。

using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;namespace DeepCloneExp
{class Program{static void Main(string[] args){Person p = new Person() { Name="tiana0",Age=20,Job=new Job(){JobName="Coder"} };Person p1 = p.ShallowClone();Person p2 = p.DeepClone();Console.WriteLine("p浅拷贝-->p1;p深拷贝-->p2");Console.WriteLine("p修改前：p.Name={0},p.Age={1},p.Job.JobName={2}", p.Name, p.Age, p.Job.JobName);Console.WriteLine("p修改前：p1.Name={0},p1.Age={1},p1.Job.JobName={2}", p1.Name, p1.Age, p1.Job.JobName);Console.WriteLine("p修改前：p2.Name={0},p2.Age={1},p2.Job.JobName={2}", p2.Name, p2.Age, p2.Job.JobName);//修改p的所有字段值p.Name = "tiana10000";p.Age = 28;p.Job.JobName = "Manager";Console.WriteLine();Console.WriteLine("p修改后：p.Name={0},p.Age={1},p.Job.JobName={2}", p.Name, p.Age, p.Job.JobName);Console.WriteLine("p修改后：p1.Name={0},p1.Age={1},p1.Job.JobName={2}", p1.Name, p1.Age, p1.Job.JobName);Console.WriteLine("p修改后：p2.Name={0},p2.Age={1},p2.Job.JobName={2}", p2.Name, p2.Age, p2.Job.JobName);}}[Serializable]class Person:ICloneable {public int Age { get; set; }  //值类型字段public string Name { get; set; }  //字符串public Job Job { get; set; }  //引用类型字段//深拷贝public Person DeepClone(){using (Stream objectStream = new MemoryStream()){IFormatter formatter = new BinaryFormatter();formatter.Serialize(objectStream,this);objectStream.Seek(0, SeekOrigin.Begin);return formatter.Deserialize(objectStream) as Person;}}public object Clone(){return this.MemberwiseClone();}//浅拷贝public Person ShallowClone(){return this.Clone() as Person;}}[Serializable]public class Job{public string JobName { get; set; }public override string ToString(){return this.JobName;}}
}

运行程序，得到以下结果：