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C# introduces a concept known as Indexers
Description Which are used for treating an object as an array   No. of Views     3001
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Author Gaurav   Posted On     10 Jan 2012
Tags C#,C# : How To    

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The indexers are usually known as smart arrays in C# community. Defining a C# indexer is much like defining properties. We can say that an indexer is a member that enables an object to be indexed in the same way as an array.

  this [argument list]
 get  {   // Get codes goes here  } 
 set  {   // Set codes goes here  }

Where the modifier can be private, public, protected or internal. The return type can be any valid C# types. The 'this' is a special keyword in C# to indicate the object of the current class. The formal-argument-list specifies the parameters of the indexer. The formal parameter list of an indexer corresponds to that of a method, except that at least one parameter must be specified, and that the ref and out parameter modifiers are not permitted. Remember that indexers in C# must have at least one parameter. Other wise the compiler will generate a compilation error.

The following program shows a C# indexer in action



using System;
using System.Collections;

class MyClass
private string []data = new string[5];
public string this [int index] 
  {   return data[index];  }
 data[index] = value;  }
class MyClient
public static void Main()
MyClass mc = new MyClass();
mc[0] = "Dotnet";
mc[1] = "Logix";
mc[2] = "is";
mc[3] = "really";
mc[4] = "good";
Console.WriteLine("{0},{1},{2},{3},{4}",mc[0],mc[1],mc[2],mc[3],mc[4]); }


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About Author I am as simple as c#. Gaurav
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