From Pluralsight/ASP.NET 6 Core Fundamentals

overview

ASP.NET Core can scaffold. This creates:

• a DbContext class—the main class that coordinates EF functionality for a given data model.
• Razor pages that handle CRUD operations for an entity.

how to scaffold from visual studio

1. Create Pages/subfolder
2. In Solution Explorer > right-click Pages/subfolder > Add > New Scaffolded Item a. Installed > Common > Razor Pages > Razor Pages using Entity Framework (CRUD) > ADD
3. In Add Razor Pages using Entity Framework (CRUD) dialog > a. Model class drop-down > select Type b. Data context class row > + i. Change data context name to desired name (should end in “Context”) > Add > Add

how to scaffold from command line

1. Install required packages:

   dotnet add package Microsoft.EntityFrameworkCore.SQLite
   dotnet add package Microsoft.EntityFrameworkCore.SqlServer # scaffolding tool requires SQL Server even if app does not
   dotnet add package Microsoft.EntityFrameworkCore.Design
   dotnet add package Microsoft.EntityFrameworkCore.Tools
   dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design
   dotnet add package Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore
   

2. Create Pages/subfolder
3. Install aspnet-codegenerator scaffolding tool:
   dotnet tool install --global dotnet-aspnet-codegenerator
4. Run scaffolding:
   dotnet aspnet-codegenerator razorpage -m Student -dc ContosoUniversity.Data.SchoolContext -udl -outDir Pages\Students --referenceScriptLibraries -sqlite

what scaffolding creates

The above scaffolding operation produce the following:

• Under Pages/subfolder:
    Create.cshtml and Create.cshtml.cs
  Delete.cshtml and Delete.cshtml.cs
  Details.cshtml and Details.cshtml.cs
  Edit.cshtml and Edit.cshtml.cs
  Index.cshtml and Index.cshtml.cs
• Data/SomeContext.cs
• Adds the context to dependency injection in Program.cs
• Adds a database connection string to appsettings.json