Csharp/C Sharp/Class Interface/Clone

Copy a class

<source lang="csharp"> /* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852

• /

// Copy a class.

using System;

// Define a structure. class MyClass {

 public int x; 

}

// Now show a class object assignment. public class ClassAssignment {

 public static void Main() { 
   MyClass a = new MyClass(); 
   MyClass b = new MyClass(); 

   a.x = 10; 
   b.x = 20; 

   Console.WriteLine("a.x {0}, b.x {1}", a.x, b.x); 

   a = b; 
   b.x = 30; 

   Console.WriteLine("a.x {0}, b.x {1}", a.x, b.x); 
 } 

}

      </source>

Demonstrate ICloneable

<source lang="csharp"> /* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852

• /

// Demonstrate ICloneable.

using System;

class X {

 public int a; 

 public X(int x) { a = x; } 

}

class Test : ICloneable {

 public X o; 
 public int b; 

 public Test(int x, int y) { 
   o = new X(x); 
   b = y; 
 } 

 public void show(string name) { 
   Console.Write(name + " values are "); 
   Console.WriteLine("o.a: {0}, b: {1}", o.a, b); 
 } 

 // Make a deep copy of the invoking object. 
 public object Clone() { 
   Test temp = new Test(o.a, b); 
   return temp; 
 } 
    

}

public class CloneDemo {

 public static void Main() {     
   Test ob1 = new Test(10, 20); 

   ob1.show("ob1"); 

   Console.WriteLine("Make ob2 a clone of ob1."); 
   Test ob2 = (Test) ob1.Clone(); 

   ob2.show("ob2"); 

   Console.WriteLine("Changing ob1.o.a to 99 and ob1.b to 88."); 
   ob1.o.a = 99; 
   ob1.b = 88; 

   ob1.show("ob1"); 
   ob2.show("ob2"); 
 } 

}

      </source>

Implements ICloneable

<source lang="csharp"> using System; using System.Text; using System.Collections.Generic; public class Employee : ICloneable {

   public string Name;
   public string Title;
   public int Age;
   public Employee(string name, string title, int age) {
       Name = name;
       Title = title;
       Age = age;
   }
   public object Clone() {
       return MemberwiseClone();
   }
   public override string ToString() {
       return string.Format("{0} ({1}) - Age {2}", Name, Title, Age);
   }

} public class Team : ICloneable {

   public List<Employee> TeamMembers = new List<Employee>();
   public Team() {
   }
   private Team(List<Employee> members) {
       foreach (Employee e in members) {
           TeamMembers.Add((Employee)e.Clone());
       }
   }
   public void AddMember(Employee member) {
       TeamMembers.Add(member);
   }
   public override string ToString() {
       StringBuilder str = new StringBuilder();
       foreach (Employee e in TeamMembers) {
           str.AppendFormat("  {0}\r\n", e);
       }
       return str.ToString();
   }
   public object Clone() {
       return new Team(this.TeamMembers);
   }

} public class MainClass {

   public static void Main() {
       Team team = new Team();
       team.AddMember(new Employee("F", "Developer", 34));
       team.AddMember(new Employee("K", "Tester", 78));
       team.AddMember(new Employee("C", "Support", 18));
       Team clone = (Team)team.Clone();
       Console.WriteLine(team);
       Console.WriteLine(clone);
       Console.WriteLine(Environment.NewLine);
       team.TeamMembers[0].Name = "NewName";
       team.TeamMembers[0].Title = "Manager";
       team.TeamMembers[0].Age = 44;
       Console.WriteLine(team);
       Console.WriteLine(clone);
   }

}

</source>

System.Array and the Collection Classes:ICloneable 1

<source lang="csharp"> using System; class ContainedValue {

   public ContainedValue(int count)
   {
       this.count = count;
   }
   public int count;

} class MyObject: ICloneable {

   public MyObject(int count)
   {
       this.contained = new ContainedValue(count);
   }
   public object Clone()
   {
       Console.WriteLine("Clone");
       return(new MyObject(this.contained.count));
   }
   public ContainedValue contained;

} public class SystemArrayandtheCollectionClassesICloneable {

   public static void Main()
   {
       MyObject    my = new MyObject(33);
       MyObject    myClone = (MyObject) my.Clone();
       Console.WriteLine(    "Values: {0} {1}",
       my.contained.count,
       myClone.contained.count);
       myClone.contained.count = 15;
       Console.WriteLine(    "Values: {0} {1}",
       my.contained.count,
       myClone.contained.count);
   }

}

      </source>

System.Array and the Collection Classes:ICloneable 2

<source lang="csharp"> using System; class ContainedValue {

   public ContainedValue(int count)
   {
       this.count = count;
   }
   public int count;

} class MyObject {

   public MyObject(int count)
   {
       this.contained = new ContainedValue(count);
   }
   public MyObject Clone()
   {
       return((MyObject) MemberwiseClone());
   }
   public ContainedValue contained;

} public class SystemArrayandtheCollectionClassesICloneable2 {

   public static void Main()
   {
       MyObject    my = new MyObject(33);
       MyObject    myClone = my.Clone();
       Console.WriteLine("Values: {0} {1}",my.contained.count, myClone.contained.count);
       myClone.contained.count = 15;
       Console.WriteLine("Values: {0} {1}", my.contained.count, myClone.contained.count);
   }

}

      </source>