Implementing CRUD controllers

In this section, we will implement the controllers to handle the HTTP requests, which are the GET, POST, PUT, and DELETE operations that are used to retrieve, create, update, and delete data, respectively.

Creating the controller

If you have installed the dotnet aspnet-codegenerator tool following Chapter 2, you can use the following command to create a controller with the specific DbContext. Do not forget to install the Microsoft.VisualStudio.Web.CodeGeneration.Design NuGet package, which is required by the dotnet aspnet-codegenerator tool:

# Install the tool if you have not installed it yet.#dotnet tool install -g dotnet-aspnet-codegenerator
dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design
dotnet-aspnet-codegenerator controller -name InvoicesController -api -outDir Controllers ––model Invoice ––dataContext InvoiceDbContext -async -actions

The preceding command has some parameters as shown here...