Indexer in c with example LEARNOVITA

Indexers in C# Tutorial | A Complete Programming Guide

Last updated on 16th Aug 2022, Blog, Tutorials

About author

Madhuri (C# Automation Tester )

Madhuri is a C# Automation Tester and She has tons of experience in the areas of HTTP, SOAP/REST, VisualStudio, TFS, etc., CI/CD, functional, regression, and .NET technology stack. She spends most of her time researching technology, and startups.

(5.0) | 17854 Ratings 2171

Introduction to Indexers in C#:

The indexers touch to the place of a part within the specific style. The indexers are performed utilizing the [ ] administrator. The part position is characterized within the rakish sections. The circling structure is used for progressing to the parts of a cluster.Here and there, the shopper must over-burden the [ ] administrator for a category that the shopper has created. The administrator technique isn’t used for over-burdening the [ ] administrator. Associate in Nursing trained worker permits Associate in Nursing item to be recorded like Associate in Nursing exhibit. The indexers are useful to assist the assembly of specific exhibits and break away a minimum of one demand.

What is C#?

C# is Associate in Nursing item settled, within the current artificial language that was created by Microsoft. It runs on the .NET Framework. C# is extraordinarily close to C/C++ and Java programming dialects. The language is planned to be a basic, current, generally helpful, object-situated artificial language. The language is used for creating programming elements.

What are the types of categories in C#?

  • Conceptual category
  • Halfway category
  • Fixed category
  • Static category

Indexers allow cases of a category or struct to be ordered much like clusters. The field value will be set or recovered while not unambiguously determining a kind or example half. Indexers take when properties except for that their accessors take boundaries.

What is Associate in Nursing trained worker in C# and how would you create one?

A trained worker permits Associate in Nursing items to be filed sort of a cluster. Whenever you characterize an Associate in Nursing trained worker for a category, this category acts as a virtual exhibit. you’ll be able to then access the case of this category utilizing the cluster access administrator ([ ]).

What are the indexers in C#?

A trained worker is Associate in Nursing exceptional reasonably property that allows a category or construction to be gotten to love Associate in Nursing exhibit for its inner assortment. C# permits the United States to characterize custom indexers, typical indexers, and over-burden indexers. Associate in Nursing trained workers will be characterized in constant manner as property with this slogan and sq. sections [].

How may indexers with totally different boundaries be utilized?

To over-burden an Associate in Nursing trained worker, Associate in Nursing Bounce it with various boundaries and each boundary has to have an alternate data kind. Indexers are over-burden bypassing a pair of distinctive types of boundaries. It’s terribly like technique over-burdening. Model 1: within the to a lower place program int and float sorts ar used to over-burden the trained worker

Utilization of Indexers: The presentation of conduct of Associate in Nursing trained workers is somewhat sort of a property. Just like the properties, you utilize an Associate in Nursing set accessors for characterizing a trained worker. In any case, properties come or set {a halficular|a specific|a selected} data part, tho’ indexers come or set a particular value from the item case. All in all, it breaks the instance data into decreased elements and files every half, gets or sets every half.

Over-burden Indexers: Indexers will be over-burden. Indexers will likewise be pronounced with various boundaries and each boundary may be Associate in Nursing alternate kind. It isn’t needed that the files should be whole numbers

Indexers (C# Programming Guide): Indexers allow cases of a category or struct to be listed much like exhibits. The recorded value will be set or recovered while not expressly determining a kind or occasion half. Indexers take when properties except for that their accessors take boundaries. The incidental model characterizes a traditional category with basic get and sets accessor ways to appoint and recover values. The Program category makes a case of this category for golf stroke away strings.

Execution of Multi-Parameter Indexers:

The indexers in C# will take quite one boundary. The shopper will build an Associate in Nursing trained worker property having quite one facet. The trained worker mark is indicated by the amount and type of boundaries within the summary. Associate in Nursing trained worker with various boundaries would do as displayed underneath:

  • the knowledge
  • }
  • set
  • the price
  • }
  • }”
Execution of Multi-Parameter Indexers

The suggests that for creating the multi parameter file ar as documented underneath:

    1. 1) Declare Associate in Nursing exhibit in Associate in Nursing application
    2. 2) within the body of the code, add the get and set accessor
    3. 3) when the property is formed, each part of the cluster by adding the sq. sections to a case of the category. The code take a look at for multi boundaries indexers in C# is as displayed underneath:

In the on top of code, a cluster ‘a’ of kind twofold is formed in Associate in Nursing application. The accessors ar enclosed within the code. The qualities for the exhibit embrace the builder of the category. The qualities ar freed within the Main() strategy for Associate in Nursing application.

Indexers Overview:

  • Indexers empower objects to be listed likewise to exhibits.
  • A get accessor returns a worth. A set accessor allocates a worth.
  • This catchphrase is utilized to characterize the indexer.
  • The worth catchphrase is utilized to characterize the worth being allocated by the set accessor.
  • Indexers don’t need to be filed by a number worth; it is dependent upon you how to characterize the particular look-into instrument.
  • Indexers can be over-burden.
  • Indexers can have more than one conventional boundary, for instance, while getting to a two-layered exhibit.

Indexer and Inheritance:

Very much like other class individuals the indexers additionally can be acquired.

  • “utilizing System;
  • utilizing System.Collections.Generic;
  • utilizing System.Linq;
  • utilizing System.Text;
  • namespace IndexerDemo

Properties of Indexers in C#:

    1. 1. Properties are otherwise called the brilliant fields in C#
    2. 2. They are the expansions of the C# information fields
    3. 3. In a class we proclaim the data fields as private and will give the public SET/GET strategies to get to the information fields
    4. 4. The access modifier can be private, public, secured, or interior
    5. 5. The return type can be any legitimate C# information type

Sentence structure of Properties:

  • “<'acces_modifier> <'return_type> <'property_name>
  • {
  • get
  • {
  • }
  • set
  • {
  • }
  • }”

Conceptual Properties:

Property inside a class can be pronounced as theoretical by utilizing the catchphrase conceptually. Recall that a theoretical property in a class conveys no code by any means. The get/set accessors are essentially addressed with a semicolon. In the inferred class we should carry out both sets and get assessors.

Program.cs:

  • using System;
  • namespace Indexers
  • {
  • class Program
  • {
  • static void Main (string [] args)
  • {
  • Indexer indexer=new Indexer ();
  • indexer[“name”]=20;
  • Console. WriteLine(indexer[“name”]);
  • Console.ReadKey();
  • }
  • }
  • }

Output:

The “this” property, intrinsically indexers, have brought esteem back. In our model, the come back esteem was variety. The sq. sections aboard “this” will likewise hold completely different data varieties and not simply variety. Within the previous model, I tried to clarify this utilizing a string boundary kind for “this”: public int this [string index Value].

The string boundary “index value” includes a price “name”, sort of a weed within the Main strategy for Program. cs. thus one will have quite one skilled worker in {an exceedingly|in a very} category terminal what ought to be the knowledge variety of the boundary price of an exhibit. An indexer, the same as properties, keeps similar tips of heritage and polymorphism.

Step by step directions to figure with indexers in C#:

The C# Programming language incorporates support for indexers – – an element that empowers you to utilize Associate in Nursing items equally as Associate in Nursing exhibit. Indexers are otherwise known as savvy exhibits and might be characterized however property is characterized.

Even though indexers and properties have likenesses during a bigger variety of how than one, there are inconspicuous contrasts between them. Not in the least like properties, you’ll be able to get to Associate in Nursing skilled worker utilizing records. recall that you simply wish to urge to a property by utilizing its name. To boot, indexers are occasional people from a category and henceforward they can’t be static. you’ll be able to have static and non-static properties.

Utilizing indexers (C# Programming Guide):

Indexers are a syntactical accommodation that empowers you to require a category, struct, or interface that consumer applications will access as a cluster. The compiler can manufacture Associate in Nursing Item property (or an except named property assuming skilled worker Name Attribute is available), and also the appropriate accessor techniques. Indexers are most frequently dead in varieties whose basic role is to embody an indoor assortment or exhibit. For example, assume you’ve got a category temporary worker record that addresses the temperature in Fahrenheit as recorded at ten distinctive times throughout a 24-hour period. the category contains a temps exhibit of kind float [] to store the temperature esteems. By ending Associate in Nursing skilled worker during this category, purchasers will get to the temporary worker matures during a temporary worker Record occasion as float temporary worker = temporary worker Record [4] instead of as float temporary worker = temp record. temps [4]. The skilled worker documentation doesn’t simply work on the synchronic linguistics for consumer applications; it to boot makes the category, and its motivation additional spontaneous for various designers to understand.

Advanced exploitation Indexers in C#:

  • Indexers ar elements in {an exceedingly|in a very} C# program that allows a category to act as an Array. you’d have the choice to involve the full category as a cluster. during this cluster, you’ll be able to store any quiet issue. The factors are placed away at a distinct space nevertheless attended by the category name itself. creating indexers for Integers, Strings, Boolean, and then on would be a sensible thought. These indexers would follow abreast of objects of the category.
  • Let’s guess you’ve got created {a category|a category} skilled worker that stores the roll variety of Associate in Nursing understudy during a class. Further, let’s guess that you simply have created an Associate in Nursing object of this category named obj1. At the purpose after you say obj1[0], you’re alluding to the principal understudy on the roll.
  • obj1.RollNumberVariable[0]
  • obj1.RollNumberVariable[1].
  • In this method, the item takes listed qualities to advertise to the number variable that’s on the Q.T. or freely placed away within the category. Assume you didn’t have this workplace then you’d presumptively advert thusly:
  • where Roll variety Variable would be the number variable. Since you’ve got puzzled about a way to list your category and a way to skip utilizing variable names over and over, you’ll be able to skirt the variable name Roll variety Variable by indexers, one thing terribly similar.
  • Indexers are created by saying their entrance intellect and while not a bring kind back. {the sort|the kind|The kind} of issue that’s placed away within the skilled worker is indicated within the boundary type following the name of the skilled worker. the subsequent is that the program that tells the most effective thanks to pronounce and involve Indexers during a C# Console climate:

Difference between Indexers and Properties:

Difference between Indexers and Properties

Data varieties in Indexers:

  • Indexer.cs
  • using System;
  • using System.Collections.Generic;
  • using System.Linq;
  • using System.Text;
  • namespace Indexers
  • category skilled worker
  • worth is ” + esteem + ” and indexValue is ” + indexValue);
  • Index = esteem;
  • }
  • get
  • worth is ” + index Value);
  • bring Index back;
  • }
  • }
  • }
  • }

Features:

  • The new plan in C# is Associate in Nursing item that goes regarding as a cluster
  • It is Associate in Nursing item which will be listed as Associate in Nursing exhibit
  • Indexer modifier is non-public, safeguarded, public or interior
  • The come back sort is any substantial C# data varieties
  • Indexers in C# ought to have a minimum of one boundary
  • Indexers square measure otherwise known as shrewd exhibits
  • Ref and Out boundaries mustn’t be indicated
  • C# will over-burden pretty much like half works
  • Indexer can’t be static

Structure:

  • The “this” watchword is used for the assembly of indexers.
  • The get and set accessors square measure utilized to execute indexers.
  • The indexers are over-burden.
  • The indexers can’t be static as they’re Associate in Nursing example half nonetheless the properties are static.
  • The official and out boundary modifiers don’t seem to be allowed within the skilled worker.
  • There has to be no but one boundary in files in any case a blunder happens.

Advantages:

  • They are used to overwhelm a [administration].
  • The synchronic linguistics is easy an easy to the consumer
  • It upholds over-burdening for any consumer characterizes exhibited in C#
  • The entrance specifiers simply the code involution

Disadvantages:

Extra Disk Space: Clustered Index doesn’t need any further storage. every Non-Clustered list needs further house because it is placed away severally from the table. The life of space needed can depend on the scale of the table, and also the range and types of sections utilized within the record.

Embed Update and Delete proclamations will prove to be slow: once DML (Data Manipulation Language) articulations (INSERT, UPDATE, DELETE) alter data in an exceedingly table, the data in each one of the records in addition ought to be invigorated. Files will facilitate, to appear and notice the columns, that we’d like to erase, however, Associate in Nursing excessive range of records to refresh will hurt the exhibition of data alterations.

Significant Points regarding Indexers:

  • Their square measures 2 styles of skilled workers as an example One Dimensional skilled worker and Multi-Dimensional Indexer. On top of examination may be a One-Dimensional skilled worker.
  • Indexers are over-burden.
  • These don’t seem to be quite an equivalent as Properties.
  • This empowers the item to be ordered on these lines to exhibits.
  • A set accessor can unceasingly allot price|the price|the value}while the get accessor can come back the worth.
  • “this” catchword is consistently accustomed to proclaim Associate in Nursing skilled workers.
  • To characterize the price being distributed by the set skilled worker, the ” esteem” watchword is used.
  • Indexers square measure otherwise known as the sensible Arrays or Parameterized Property in C#.
  • Indexer can’t be a static half because it may be a case individual from the category.

Pre-Requisites:

Like capacities, Indexers will likewise be over-burden. In C#, we are able to have varied indexers during a solitary category. To over-burden AN trained worker, proclaim it with varied boundaries and each boundary got to have AN alternate data kind. Indexers square measure over-burden bypassing two distinct sorts of boundaries. It’s terribly like technique over-burdening.

Conclusion:

With this text, we tend to finished much all of the things connected with AN trained worker. We tend to do several concerned labs to elucidate our concepts. I trust my per users presently apprehend within and out with regards to those essential concepts and can perpetually keep in mind them. These could likewise assist you in breaking C# interviews.

Are you looking training with Right Jobs?

Contact Us

Popular Courses