Recfatoring Switch with Ploymorphism

You misunderstood the concept here.

We can eliminate the switch case by using Polymorphism only where your are following OOP design but NOT in normal Switch usage like you example.

If you want to use polymorphism, then your methods class structure should be as my example[Should follow OOP].

Hi Jaganthan,

Thanks for your prompt reply. Can you Please explain how this can be achieved. how can use Polymorphism in this case to elimimate using Switch statement

For Ex:

foreach (DataRow dr in dt.Rows)
{

  switch(dr["value"].ToString())
  {

  case a :
  MethodA();
  break;

  case a :
  MethodB();
  break;

  case a :
  MethodC();
  break;
  }
}

Thanks, Shankar M

Hi,

If you are designing an application with OOPs C# & you are using Switch Statement, we can replace the switch statement with polymorphism concept.

Here is working example

using System.IO;
using System;

class Program
{
  static void Main()
  {
  Animal[] ani = new Animal[] { new Dog(), new Cat() }; 
 
 
  // Using Switch
  foreach (Animal a in ani)
  {
  a.makeSound();
  var type = a.GetType();
  switch (type.ToString()) {
  case "Dog":
  a.makeSound();
  break;
  case "Cat":
  a.makeSound();
  break;
  }
 
  }
 
  //Eliminating Switch
  foreach(Animal animal in ani)
  {
  animal.makeSound();
  }
  }
 
  abstract class Animal { 
  public abstract void makeSound(); 
  } 
 
class Dog : Animal { 
  public override  void makeSound() { 
  Console.WriteLine("Woof!"); 
  } 
} 
 
class Cat : Animal { 
  public override void makeSound() { 
  Console.WriteLine("Meow!"); 
  } 
} 
 
}