It eliminates the majority of the data-access code that developers must routinely write. It uses EDM in building SQL queries from LINQ queries, building INSERT, UPDATE, and DELETE commands, and transform database result into entity objects. We are now ready to use the potential of our ORM, as far as development is concerned.

Each entity possesses a state according to the operation performed by the context class. The entity state can be represented by an enum System.Data.Entity.EntityState in EF 6. Entity framework is an Object Relational Mapping (ORM) framework that offers an automated mechanism to developers for storing and accessing the data in the database.

Entity Framework Core

As per the above figure, Entity Framework fits between the business entities (domain classes) and the database. Now your object directly works with the database to retrieve or make changes. Here, I have requested the creation of a migration from CostoStandardSuArticoli name. You will notice the creation of a class file in the folder Migration (whose class extends the type DbMigration), the name composed of the current timestamp and the name that we typed.

what is entity framework in c#

But if there is any mistake, please post the problem in the contact form. You should have a basic knowledge of Visual Studio, C#, and MS SQL Server to make the most of this tutorial.

What Is the Use of Entity Framework in C#?

This tutorial is designed for those who want to learn how to start the development of Entity Framework in their application. EF API infers INSERT, UPDATE, and DELETE commands based on the state of entities when the SaveChanges() method is called. The ChangeTrack keeps track of the states of each entity as and when an action is performed. Learn Entity Framework using simple yet practical examples on for free. While using this site, you agree to have read and accepted our terms
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what is entity framework in c#

Developers can work with data in domain-specific objects and properties, such as customers and customer addresses, without worrying about the underlying database tables and columns where this data is kept, courtesy of the Entity Framework. Developers may work with data in domain-specific objects and properties, such as customers and customer addresses, without worrying about the underlying database tables and columns where this data is kept, courtesy of the Entity Framework. As you can see in the above figure, EF API will create the database based on your domain classes and configuration. This means you need to start coding first in C# or VB.NET and then EF will create the database from your code.

Demo Project

It is an entity class that does not depend on any framework-specific base class. It is the normal .NET CLR class that’s why it is named “Plain Old CLR Objects”. It supports many operations like update, create, and delete that are generated by the entity data model. It is the most crucial class when it comes to working with EF 6 or EF Core.

what is entity framework in c#

Let us first consider the Database-First mode, which – as we said – is mainly directed to the existing database, i.e from which to derive a model. We recall once again that, at least during the writing of this article, by EF7 onwards, this mode has been suppressed in favor of Code-First and is an important point to keep in mind, when you are going to evaluate the analysis of a solution. This approach is an alternative for the code-first approach and the model-first approach. It creates the model and codes from the database in the project and connects them with the database and developer. This model is best suitable for new projects where the database does not exist. This model is stored using the EDMX file and can be viewed and edited by the developer.

Entity Framework using C#

Following the Database-First paradigm, we have already mentioned how the database will provide the framework modeling classes and not vice versa. If we had taken account of this constraint in the design phase, by inserting the Foreign Keys where appropriate, EF would notice it and would be going to create this kind of report automatically. Then we perform a variation on the database structure to see how this affects things in modeling classes. In this article, we will see how to use Entity Framework in a C# application. Entity Framework (EF) is an object-relational mapper for .NET developers that allows them to work with relational data using domain-specific objects.

what is entity framework in c#

This allows you to move fully into field Code-First control of the data modeling, which in the current environment, we still derived from an existing database. After a few seconds of waiting, it will be raised, which will warn us of the difference between our data model and what we are trying to access. In this case, the CostoStandard column is not a valid field and in fact, is not present in the database.

Supported Database Providers

We recommend the reader to be familiar with these basics, waiting to continue in this overview with the next items in the series. The C# Entity Framework is a set of ADO.NET technologies that aid in developing data-driven software. C# Entity framework is an Object Relational Mapping (ORM) framework that gives developers an automated way to store and access databases. The Entity Framework allows developers to work with data at a higher level of abstraction.

Entity Framework allows you to develop and maintain data-oriented apps with less code than traditional applications. Entity Framework introduced the Code-First approach with Entity Framework 4.1. In the Code-First approach, you focus on the domain of your application and start creating classes for your domain entity rather than design your database first and then create the classes which match your database design. Basically Model is a class that represent database table, stored procedure, function and so on.

Let’s see in detail, starting from a class; what in the case of Database-First was not immediately visible. Add back an object of type ADO.NET Entity Data Model, which we will call “TechnetModelloCF”. The steps to follow are similar to those already seen previously, with the exception of the mode to be selected, which in this case will be “Code-First from Database”. We continue entity framework meaning the remaining steps, as you did in the case of Database-First. In this article, we will see how to use Entity Framework in C# Applications using Visual Studio. The examples in this article and probably in the next, will be C # used under WinForms, but – as mentioned – this choice is not going to affect a different intended use that the developer may reasonably request.

what is entity framework in c#

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