The Xamarin and Mono projects worked to bring. NET Framework has only worked on Windows devices. In this post, we’ll explain their key differences and how to make the best use of each. NET Core vs.NET Framework to help you choose which one to use for your next project. NET Framework, and what do you need to know to use them both effectively? Indeed, there is huge demand for developers skilled in this technology. NET Core would be the next big thing, offering developers many options in application development. The Discriminator column is invisible to developers from C#, but we can see it in the database schema generated by EF Core 5.A while back we predicted that. EF Core 5 applies an approach known as Table-per-hierarchy (TPH), where we store hierarchically related entities in a single table.Įach record’s type is distinguished by a Discriminator column, which usually holds a simplified C# type name. We had mentioned that both a Movie and a Series could be a Production. Let’s look at our models, starting with a Production. I hope as folks read these sentences, they start to formulate the relationships in their mind. An Actor will always portray a Character. Our subject matter is Entertainment, both movies and television, which we’ll call Productions. We’ll keep the subject simple, but we’ll also explore some important EF Core concepts. We’ll see how this works as we get into defining our classes.īefore diving into C# code, let’s discuss our topic. Typically, our classes will map one to one with our database tables, and relationships between tables are defined using navigational conventions. To get started using EF Core 5, we need to define a class that derives from DbContext and contains our models. What is DbContext? The DbContext is a specialized base class that tracks our in-memory operations, allowing us to write and execute queries, track changes that we can persist back to our database, and interact with our database engine indirectly or directly in exceptional circumstances. Code-first modelingĮvery EF Core solution will have at least one DbContext implementation. Great! We’re now ready to start modeling our problem domain.įolks who want to follow along can clone a sample project from GitHub. When we finish setting up our project, we can run the dotnet-ef command, where the EF unicorn will greet us. From within the newly created project directory type the following commands into Rider’s integrated terminal. We can use the NuGet tool window to find and install all these packages into our project.Īdditionally, we will want to install the dotnet-ef command-line tool (CLI). Starting with a brand new console application, we will need to install the following packages, making sure that all the versions are 5.0.0: NET Core 3.1, but aligning versions is always a good idea. To get started, I recommend folks install the latest version of the. We’ll design a schema for entertainment productions using a code-first approach, migrate an SQLite database to our schema’s current incarnation, seed our database, and run some typical LINQ queries. In this post, we’ll see how we can get started with EF Core 5. Conceived initially as a designer-centric tool heavily reliant on Visual Studio’s graphical user interface and SQL Server, EF’s current philosophy recognizes the need to be friendlier to ideas like distributed source-control, build servers, multiple database engines, and operating systems. For those unfamiliar with the technology, Entity Framework is an object-relational mapper (ORM), helping developers overcome the impedance mismatches between C# and a database instance’s schema.Įntity Framework has come a long way since its original inception. Let’s say a few things have changed since the initial release. NET community got its first glimpse of Entity Framework (EF) on August 11th, 2008, with the release of. NET 5 release comes the newest Entity Framework Core version, unsurprisingly called Entity Framework Core 5 (EF Core 5).
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