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-->In this tutorial, you create a .NET Core console app that performs data access against a SQLite database using Entity Framework Core.
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- In this tutorial, you create a.NET Core console app that performs data access against a SQLite database using Entity Framework Core. You can follow the tutorial by using Visual Studio on Windows, or by using the.NET Core CLI on Windows, macOS, or Linux.
You can follow the tutorial by using Visual Studio on Windows, or by using the .NET Core CLI on Windows, macOS, or Linux.
View this article's sample on GitHub.
Prerequisites
Install the following software:
- .NET Core SDK.
- Visual Studio 2019 version 16.3 or later with this workload:
- .NET Core cross-platform development (under Other Toolsets)
Create a new project
- Open Visual Studio
- Click Create a new project
- Select Console App (.NET Core) with the C# tag and click Next
- Enter EFGetStarted for the name and click Create
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Install Entity Framework Core
To install EF Core, you install the package for the EF Core database provider(s) you want to target. This tutorial uses SQLite because it runs on all platforms that .NET Core supports. For a list of available providers, see Database Providers.
- Tools > NuGet Package Manager > Package Manager Console
- Run the following commands:
Tip: You can also install packages by right-clicking on the project and selecting Manage NuGet Packages
Create the model
Define a context class and entity classes that make up the model.
- In the project directory, create Model.cs with the following code
- Right-click on the project and select Add > Class
- Enter Model.cs as the name and click Add
- Replace the contents of the file with the following code
EF Core can also reverse engineer a model from an existing database.
Tip: This application intentionally keeps things simple for clarity. Connection strings should not be stored in the code for production applications. You may also want to split each C# class into its own file.
Create the database
The following steps use migrations to create a database.
- Run the following commands:This installs dotnet ef and the design package which is required to run the command on a project. The
migrations
command scaffolds a migration to create the initial set of tables for the model. Thedatabase update
command creates the database and applies the new migration to it.
- Run the following commands in Package Manager Console (PMC)This installs the PMC tools for EF Core. The
Add-Migration
command scaffolds a migration to create the initial set of tables for the model. TheUpdate-Database
command creates the database and applies the new migration to it.
Create, read, update & delete
- Open Program.cs and replace the contents with the following code:
Run the app
Visual Studio uses an inconsistent working directory when running .NET Core console apps. (see dotnet/project-system#3619) This results in an exception being thrown: no such table: Blogs. To update the working directory:
- Right-click on the project and select Edit Project File
- Just below the TargetFramework property, add the following:
- Save the file
Now you can run the app:
- Debug > Start Without Debugging
Next steps
- Follow the ASP.NET Core Tutorial to use EF Core in a web app
- Learn more about LINQ query expressions
- Configure your model to specify things like required and maximum length
- Use Migrations to update the database schema after changing your model
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