DbSet for each entity in your application. The entity framework core DbContext class includes a property i.e. Public EmployeeContext(DbContextOptions options):base(options) To pass the DbContextOptions instance we need to use the constructor of EmployeeContext class as shown below and In DbContextOptions, TContext is a Generic type Context Class that we are Using.Īn options is passed to the base class in order to tell the Base Constructor which Overload Constructor we are using. The instance of the DbContextOptions carries all the required configuration information such as the Connection string, Database providers etc. In order to perform any useful task by the DbContext class, we need an instance of the DbContextOptions class. Now create the Constructor of the EmployeeContext Class In Order to Tell the EF Core about the Connection String of the Database Provider. In order to create DbContext Class we will add a Folder Named Data at root level and In that we’ll create a class named EmployeeContext.cs which we'll Inherit from DbContext Class, thus EmployeeContext class will becomes our Context class. Execute CRUD operations on the database.Some of the features that DBContext class provides: Now, to interact with the database, we need to add the DbContext class, which is an integral part of the EntityFramework. We will add a few Properties to the Employee Model class that will acts as Column in our Database, so change the Employee class as follows: using System Let’s Navigate to Model Folder and Create Class Named as Employee.cs So as of now we are ready to go and use EF Core in our Application. Install NuGet Package for EF Core Tools " ". This tool will allow us to execute the EF Core Commands such as Migrations and Scaffolding directly from the Package Manager Console (PMC) or Using Dotnet CLI. Together with the DB Provider we will need EF Core Tools which allows us to easily execute EF Core Commands. Install NuGet package for the Database Provider that we want to access.Here we are using SQL SERVER as DB Provider so we will install " ".įor different databases, there are different EF Core DB Providers available. In addition to EF Core, we will need the EF Core DB Provider, which is also included as NuGet package. Other Nuget Packages that are dependent are also installed. Select your project, click on the install and review all the changes made to your project, as well as accept the licenses attached to the various packages you are about to install. ![]() Make sure the browser is selected at the top and search for " EntityFrameworkCore" and install the Package Microsoft. In order to do that, go to Tools>NuGet Package Manager>Manage NuGet Packages for Solution. Note : Make sure you install the packages that are compatible with your. Now we can install Entity Framework Core via one of the package management tool i.e Nuget Package Manager. Here we will start with Code First approach, Installing EF CoreĬreate a new project and choose ASP.NET Web App (Model-View-Controller) In this case, the database is already in place, so we design a model to match it. When a database doesn't exist, we create a model, then EF Core creates a database with the defined fields. In order to work with EF Core for databases you can use two approaches, in accordance with the situation. Comes with Built-in Logging Feature (logs the entities).It generates the queries and executes them on its own.It maps the Domain Model to database objects.ORMs are pre-written libraries of code that do lots of things, some of which are listed below. ![]() Object Relational Mapper is a technique that allows developers to work with data in an object-oriented way. Understanding EF CoreĮntity Framework Core is the latest version of Entity Framework from Microsoft, which is an Object Relational Mapper (ORM). The purpose of this article is to tell you about how to work with databases in your ASP.NET applications, such as SQL Server, SQLite, and PostgreSQL and map objects to data with the help of an open-source framework called Entity Framework Core (EF Core).
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