INDEXER in C#

INDEXER IN C#:



In c# introduce new concept is Indexer. This is very useful for some situation. Let as discuss something about Indexer.


Indexer Concept is object act as an array.
Indexer an object to be indexed in the same way as an array.
Indexer modifier can be private, public, protected or internal.
The return type can be any valid C# types.
Indexers in C# must have at least one parameter. Else the compiler will generate a compilation error.
this [Parameter]

{

get

{

// Get codes goes here

}

set

{

// Set codes goes here

}

}



For Example:



using System;

using System.Collections.Generic;

using System.Text;



namespace Indexers

{

class ParentClass

{

private string[] range = new string[5];

public string this[int indexrange]

{

get

{

return range[indexrange];

}

set

{

range[indexrange] = value;

}

}

}



/* The Above Class just act as array declaration using this pointer */



class childclass

{

public static void Main()

{

ParentClass obj = new ParentClass();



/* The Above Class ParentClass create one object name is obj */



obj[0] = "ONE";

obj[1] = "TWO";

obj[2] = "THREE";

obj[3] = "FOUR ";

obj[4] = "FIVE";

Console.WriteLine("WELCOME TO C# CORNER HOME PAGE\n");

Console.WriteLine("\n");



Console.WriteLine("{0}\n,{1}\n,{2}\n,{3}\n,{4}\n", obj[0], obj[1], obj[2], obj[3], obj[4]);

Console.WriteLine("\n");

Console.WriteLine("ALS.Senthur Ganesh Ram Kumar\n");

Console.WriteLine("\n");

Console.ReadLine();

}

}

}