


The following editor will bring you an articleC#How to implement copying and deep copying. The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor and take a look.
The difference between deep copy and shallow copy is that shallow copy only copies the value of the value type, but the object contained in the instance still points to the original There are examples.
class Program { [Serializable] public class Car { public string name; public Car(string name) { this.name = name; } } [Serializable] public class Person:ICloneable { public int id; public string name; public Car car; public Person() { } public Person(int id, string name, Car car) { this.id = id; this.name = name; this.car = car; } public Object Clone() //实现ICloneable接口,达到浅表复制。浅表复制与深度复制无直接有关系。 对外提供一个创建自身的浅表副本的能力 { return this.MemberwiseClone(); } } //要复制的实例必须可序列化,包括实例引用的其它实例都必须在类定义时加[Serializable]特性。 public static T Copy<T>(T RealObject) { using (Stream objectStream = new MemoryStream()) { //利用 System.Runtime.Serialization序列化与反序列化完成引用对象的复制 IFormatter formatter = new BinaryFormatter(); formatter.Serialize(objectStream, RealObject); objectStream.Seek(0, SeekOrigin.Begin); return (T)formatter.Deserialize(objectStream); } } static void Main(string[] args) { Person p1 = new Person(1, "Scott", new Car("宝马")); Console.WriteLine("原始值:P1:id={0}----------->name={1}------>car={2}", p1.id, p1.name, p1.car.name); Person p2 = Copy<Person>(p1); //克隆一个对象 Person p3 = p1.Clone() as Person;//浅表复制 Console.WriteLine("改变P1的值"); p1.id = 2; p1.name = "Lacy"; p1.car.name = "红旗"; Console.WriteLine("P1:id={0}----------->name={1}------>car={2}", p1.id, p1.name, p1.car.name); Console.WriteLine("深度复制:P2:id={0}----------->name={1}------>car={2}", p2.id, p2.name, p2.car.name); Console.WriteLine("浅表复制:P3:id={0}----------->name={1}------>car={2}", p3.id, p3.name, p3.car.name); Console.ReadKey(); }
Run results:
##1. When T in the List
List<T> oldList = new List<T>(); oldList.Add(..); List<T> newList = new List<T>(oldList);
2. T in the List
static class Extensions { public static IList<T> Clone<T>(this IList<T> listToClone) where T: ICloneable { return listToClone.Select(item => (T)item.Clone()).ToList(); } //<SPAN style="COLOR: #000000">当然前题是List中的对象要实现ICloneable接口</SPAN> }2. Another method of deep copying the reference object is serialization. This method is the most reliable.
public static T Clone<T>(T RealObject) { using (Stream objectStream = new MemoryStream()) { //利用 System.Runtime.Serialization序列化与反序列化完成引用对象的复制 IFormatter formatter = new BinaryFormatter(); formatter.Serialize(objectStream, RealObject); objectStream.Seek(0, SeekOrigin.Begin); return (T)formatter.Deserialize(objectStream); } }3. Using System.
Xml.Serialization to implement serialization and deserialization
public static T Clone<T>(T RealObject) { using(Stream stream=new MemoryStream()) { XmlSerializer serializer = new XmlSerializer(typeof(T)); serializer.Serialize(stream, RealObject); stream.Seek(0, SeekOrigin.Begin); return (T)serializer.Deserialize(stream); } }
The above is the detailed content of Detailed explanation of how to implement copy and deep copy in C#. For more information, please follow other related articles on the PHP Chinese website!

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