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| title | author | description | keywords | ms.author | manager | ms.date | ms.topic | ms.assetid | ms.technology | ms.prod | uid |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Adding a model to an ASP.NET Core MVC app | rick-anderson | Add a model to a simple ASP.NET Core app. | ASP.NET Core, | riande | wpickett | 03/30/2017 | get-started-article | 8dc28498-00ee-4d66-b903-b593059e9f39 | aspnet | asp.net-core | tutorials/first-mvc-app/adding-model |
[!INCLUDEadding-model]
In Solution Explorer, right click the MvcMovie project > Add > New Folder. Name the folder Models.
Right click the Models folder > Add > Class. Name the class Movie and add the following properties:
[!code-csharpMain]
The ID field is required by the database for the primary key.
Build the project to verify you don't have any errors. You now have a Model in your MVC app.
Scaffolding a controller
In Solution Explorer, right-click the Controllers folder > Add > Controller.
In the Add MVC Dependencies dialog, select Minimal Dependencies, and select Add.
Visual Studio adds the dependencies needed to scaffold a controller, but the controller itself is not created. The next invoke of > Add > Controller creates the controller.
In Solution Explorer, right-click the Controllers folder > Add > Controller.
In the Add Scaffold dialog, tap MVC Controller with views, using Entity Framework > Add.
Complete the Add Controller dialog:
- Model class: Movie (MvcMovie.Models)
- Data context class: Select the + icon and add the default MvcMovie.Models.MvcMovieContext
- Views: Keep the default of each option checked
- Controller name: Keep the default MoviesController
- Tap Add
Visual Studio creates:
- An Entity Framework Core database context class (Data/MvcMovieContext.cs)
- A movies controller (Controllers/MoviesController.cs)
- Razor view files for Create, Delete, Details, Edit and Index pages (Views/Movies/*.cshtml)
The automatic creation of the database context and CRUD (create, read, update, and delete) action methods and views is known as scaffolding. You'll soon have a fully functional web application that lets you manage a movie database.
If you run the app and click on the Mvc Movie link, you'll get an error similar to the following:
An unhandled exception occurred while processing the request.
SqlException: Cannot open database "MvcMovieContext-<GUID removed>"
requested by the login. The login failed.
Login failed for user Rick
You need to create the database, and you'll use the EF Core Migrations feature to do that. Migrations lets you create a database that matches your data model and update the database schema when your data model changes.
Add EF tooling for Migrations
-
In Solution Explorer, right click the MvcMovie project > Edit MvcMovie.csproj.
-
Add the
"Microsoft.EntityFrameworkCore.Tools.DotNet"NuGet package:
[!code-xmlMain]
Note: The version numbers shown above were correct at the time of writing.
Save your changes.
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[!INCLUDEadding-model]
Additional resources
[!div class="step-by-step"] Previous Adding a View Next Working with SQL