How to implement Type switching

Question

I have a certain code snippets that needs to be executed if data-type of the variable matches to a certain base-type.Currently I'm doing this using if-else loop

ex:

  if(a is float)
  {
   // do something here
  }
  else if (a is int)
  {
  // do something here
  }
  else if (a is string)
  {
  // do something here
  }

As i have too many types against which i have to compare ,Using If else is quite clumsy . As C# doesn't allow type switching , Is there an alternative way to do this?

Answer 1

Refactor the code and use method overloading:

void SomeCode()
{
    ...
    Action(3.0f); // calls float overload
    Action("hello"); // calls string overload
    ...
}

void Action(float a)
{
    ...
}
void Action(int a)
{
    ...
}
void Action(string a)
{
    ...
}

---

EDIT:
By using the dynamic keyword (.NET 4) it works this way (full console app):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            SomeCode();
        }

        static void SomeCode()
        {
            object o = null;
            switch (new Random().Next(0, 3))
            {
                case 0:
                    o = 3.0f;
                    break;
                case 1:
                    o = 3.0d;
                    break;
                case 2:
                    o = "hello";
                    break;
            }
            Action((dynamic)o); // notice dynamic here
        }

        static void Action(dynamic a)
        {
            Console.WriteLine("object");
        }

        static void Action(float a)
        {
            Console.WriteLine("float");
        }
        static void Action(int a)
        {
            Console.WriteLine("int");
        }
        static void Action(string a)
        {
            Console.WriteLine("string");
        }
    }
}