![]() To leverage the in-memory capabilities of EF Core in your application, you should add the package to your project. Let’s get started! Install the EF Core InMemory NuGet package Use dependency injection in the controller to access the Repository instance.Add the Repository as a service to the container.Install the EF Core InMemory NuGet package.We’ll follow these steps to create and use an in-memory database in ASP.NET Core 6: In this section we’ll examine how we can use an in-memory database to store and retrieve data in an ASP.NET Core 6 application. Using an in-memory database in ASP.NET Core 6 But again, these downsides don’t really apply to using an in-memory database for testing. As a result, an in-memory database may not be suitable for applications that deal with vast amounts of data. This means that if the application crashes, all of the data residing in the in-memory database will be lost.Īnother downside is that an in-memory database uses much more memory compared to a traditional database that resides on a physical disk (and memory is far more expensive than disk storage). One of these is that if you’re using an in-memory database, the data will not be persisted when the application stops running (unless you take steps to persist it). There are also some notable downsides to using an in-memory database, though these apply to production use and not our testing scenario. You can also take advantage of in-memory databases to store transient data, i.e., data that does not need to be persisted to the disk. In-memory databases are often used for caching purposes, as they can hold a copy of often-used data in memory for quick access. Reading and writing data stored on a physical disk is a resource-intensive operation. Naturally, reads and writes for an in-memory database are many times faster than for a disk-based database, because the application need not wait for the data to be physically written to or read from the disk. What is an in-memory database?Īn in-memory database is a database that resides in volatile memory instead of on a physical disk. And because an in-memory database is both fast and fast to set up, it is very handy to use one for unit testing. The ability to store and retrieve data in memory using the EF Core In-Memory Database Provider is especially well-suited for testing apps or for building applications that need to store data temporarily. This is because LINQ allows you to write queries directly in C# instead of SQL or some other query language. (You’ll find a complete list of EF Core providers here.) And, as we’ve noted, EF Core supports storing and retrieving data to and from memory using its In-Memory Database Provider.ĮF Core also supports LINQ (Language Integrated Query), which makes it easier to write queries against the data in your database. What is EF Core? When should we use it?ĮF Core is a lightweight, open-source, extensible ORM (Object Relational Mapper) that supports several database providers including SQLite, MySQL, PostgreSQL, and Microsoft SQL Server. We’ll use this ASP.NET Core 6 Web API project to work with EF Core and an in-memory database in the subsequent sections of this article. Ensure that the check boxes “Enable Docker,” “Configure for HTTPS,” and “Enable Open API Support” are unchecked as we won’t be using any of those features here.Leave the “Authentication Type” set to “None” (default). NET 6.0 as the target framework from the drop-down list at the top. In the “Additional Information” window shown next, select.Optionally check the “Place solution and project in the same directory” check box, depending on your preferences.In the “Configure your new project” window, specify the name and location for the new project.In the “Create new project” window, select “ASP.NET Core Web API” from the list of templates displayed. ![]() Following these steps will create a new ASP.NET Core 6 Web API project in Visual Studio 2022: Create an ASP.NET Core Web API project in Visual Studio 2022įirst off, let’s create an ASP.NET Core project in Visual Studio 2022. If you don’t already have a copy, you can download Visual Studio 2022 here. To work with the code examples provided in this article, you should have Visual Studio 2022 installed in your system. This article discusses how we can use EF Core with an in-memory database in an ASP.NET Core 6 application.
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