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Vikhrmodels
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programming_books_eng

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{
var item1 = new TodoItem
{
Title = "Learn ASP.NET Core",
DueAt = DateTimeOffset.Now.AddDays(1)
};
var item2 = new TodoItem
{
Title = "Build awesome apps",
DueAt = DateTimeOffset.Now.AddDays(2)
};
return Task.FromResult(new[] { item1, item2 });
}
}
}
This FakeTodoItemService implements the ITodoItemService interface
but always returns the same array of two TodoItem s. You'll use this to
test the controller and view, and then add real database code in Use a
database.
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Add a service class
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Use dependency injection
Use dependency injection
Back in the TodoController , add some code to work with the
ITodoItemService :
public class TodoController : Controller
{
private readonly ITodoItemService _todoItemService;
public TodoController(ITodoItemService todoItemService)
{
_todoItemService = todoItemService;
}
public IActionResult Index()
{
// Get to-do items from database
// Put items into a model
// Pass the view to a model and render
}
}
Since ITodoItemService is in the Services namespace, you'll also need
to add a using statement at the top:
using AspNetCoreTodo.Services;
The first line of the class declares a private variable to hold a reference to
the ITodoItemService . This variable lets you use the service from the
Index action method later (you'll see how in a minute).
The public TodoController(ITodoItemService todoItemService) line
defines a constructor for the class. The constructor is a special method
that is called when you want to create a new instance of a class (the
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