C# .NET Core Entity Framework Example Tutorial for Beginners

Embarking on a journey into the world of .NET Core development with Entity Framework? You're in the right place. This comprehensive guide will walk you through creating a practical example – a simple blog API using C#, .NET Core, and Entity Framework Core (EF Core). Let's dive in!

Before we begin, ensure you have the .NET Core SDK 3.1 or later installed. We'll be using VS Code for our text editor, and you can install the necessary extensions – C# for Visual Studio Code and EF Core Power Tools. Let's call our project "SimpleBlogAPI".

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Setting Up the Project and Database

First, create a new .NET Core Web API project in VS Code using the terminal:

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$ dotnet new webapi -n SimpleBlogAPI

Navigate to the project folder and install the required packages:

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$ cd SimpleBlogAPI

$ dotnet add package Microsoft.EntityFrameworkCore.InMemory

Creating the Database Context

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In the Solution Explorer, right-click on the project and add a new class named "ApplicationDbContext.cs". This will be our Entity Framework Core database context.

In the "ApplicationDbContext.cs" file, create a simple DBSet for a "Blog" model with an ID, Title, and Content:

Setting Up the Model

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Right-click on the project again, add a new class named "Blog.cs", and define a simple model with required properties. Don't forget to apply the [Key] attribute to the ID property.

Creating the API Controllers

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Now, let's create API controllers for our simple blog posts. Right-click on the "Controllers" folder and add a new API controller named "BlogsController.cs".

Implementing API Endpoints

In the "BlogsController.cs" file, implement the standard CRUD operations:

- GET: Returns a list of all blog posts.

- POST: Adds a new blog post.

- GET(id): Returns a single blog post by ID.

- PUT(id): Updates an existing blog post.

- DELETE(id): Deletes a blog post by ID.

Using the Database Context in the Controller

Inject the "ApplicationDbContext" into the "BlogsController.cs" file and use it in the CRUD methods to interact with the database.

Finally, run the application using the terminal command:

$ dotnet run

Your simple blog API should now be up and running on .

Exploring Entity Framework Core in this context is just the beginning. The .NET Core world offers a vast range of possibilities for building modern, efficient, and robust applications. Happy coding!