What is indexer?,Java, C ,C++, ASP, ASP.net C# ,Struts ,Questions & Answer, Struts2, Ajax, Hibernate, Swing ,JSP , Servlet, J2EE ,Core Java ,Stping, VC++, HTML, DHTML, JAVASCRIPT, VB ,CSS, interview ,questions, and answers, for,experienced, and fresher
What is indexer?

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.

Signature:-
          his [Parameter]

{

    get

    {

        // Get codes goes here

    }

    set

    {

        // Set codes goes here

    }

} 
.................................................
Exapmle:-


 using System;

using System.Collections.Generic;

using System.Text;

 

namespace Indexers

{

    class PClass

    {

        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 cclass

    {

        public static void Main()

        {

            PClass obj = new PClass();

 

               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();

        }

    }

} 

More interview questions and answers
Can you declare an override method to be static if the original method is not static?
What are the different ways a method can be overloaded?
What’s a delegate?
What’s a multicast delegate?
What’s the implicit name of the parameter that gets passed into the class’ set method?
How do you inherit from a class in C#?
When you inherit a protected class-level variable, who is it available to?
Describe the accessibility modifier protected internal.?
. What does the keyword virtual mean in the method definition?
Can you declare the override method static while the original method is non-static?
Can you override private virtual methods?
What is CLR?
What’s an interface class?
What is Shallow Copy and Deep Copy in .NET?
Explain Web Services?
What is Postback in Asp.net?
Explain the differences between server-side and client-side code in Asp.Net?
What is the ASP.NET validation controls?
Is it possible to create custom events for an object
Is it possible for objects that don't have an interface to support events?
Is there an easy way to get help about an object's member
Describe Paging in ASP.NET?
what's Param?
What is the difference between Server.Transfer and Response.Redirect?
What is Data Binding?
Do Web controls support Cascading Style Sheets?
What classes are needed to send e-mail from an ASP.NET application?
What is ViewState?
What's OUT Keyword?
Define ASP.Net page life cycle in brief ?
What do you mean by three-tier architecture?
What's REF Keyword?
What's Delegate?
Write the code that creates a cookie containing the user name R4R and the current date to the user computer. Set the cookie to remain on the user computer for 30 days?
Wat's feature of delegate?
Describe the property of cookie in Asp.Net ?
Wat's Property?
Differences between Web and Windows applications?
What is the main difference between the Button server control and the Button HTML control?
What is the difference between web.config and Machine.config files?
What is Method Overloading ?
How do you require authentication using the Web.config file?
What is Partial types?
What is Aliases?
What is Static classes?
What is Methods?
How to create Multivalued Cookie ?
Define Error Events in Asp.Net?
Why the exception handling is important for an application?
What is indexer?
Explain the aim of using EnableViewState property?
What are the two levels of variable supported by Asp.net?
Difference between Session object and Profile object in ASP.NET?
What is Event?
What is the Default Expiration Period For Session and Cookies,and maximum size of viewstate?
What is the use of Global.asax File in ASP.NET Application ?
Explain exception handling in C#?
What is the Purpose of System.Collections.Generic ?
What is GAC and name of the utility used to add an assembly into the GAC ?
Explain Exception handling
Whether we can use vbscript and javascript combination for validation?
What are the different states in ASP.NET?
Define State managment?
What is Authentication and Authorization ?
Discribe Client Side State Management?
Describe Server Side State Management ?
What is SessionID?
What is the Session Identifier?
Advantages of using Session State?
Disadvantages of using Session State ?
What are the Session State Modes? Define each Session State mode supported by ASP.NET.
What is a Master Page in Asp.Net?
What are the 2 important parts of a master page and file extension for a Master Page?
How do you identify a Master Page and how do you bind a Content Page to a Master Page?
Can you dynaimically assign a Master Page?
From the content page code how can you reference a control on the master page?
What is Globalization?
What are the 3 different ways to globalize web applications?
What are the steps to follow to get user\'s culture at run time?
What do you mean by neutral cultures?
What is the advantage of using Windows authentication in a Web application?
What is the default authentication method when you create a new Web application project?
How do you get a User Identity?
How do you determine, what is the role of the current user?
Can you specify authorization settings both in Web.config and in IIS?
What are the 2 Layouts supported by a Web form in ASP.NET?
What is the difference between Literal and Lable Control?
What is smart navigation?
Explain the difference between a database administrator and a data administrator.
Explain the difference between a database administrator and a data administrator.
What is a Database Transactions ?
What is ACID?
What is Concurrency?
What is a Deadlock?
Define rollback and roll forward ?
what is database?
Explain about object oriented databases?
Explain about XML databases?
Explain about the hierarchical model of database?
Explain about Network model?