ASP.NET 5 MVC（Visual Studio 2015）：一个名为Inject的关键字

Question

I've just installed visual studio 2015 and played around the ASP.NET 5 template (MVC) and I saw a keyword called inject that has been used in the view. Is it for dependency injection, and if yes how does it work? Assuming the below code:

[Authorize]
public class AccountController : Controller
{
    private readonly UserManager<ApplicationUser> _userManager;
    private readonly SignInManager<ApplicationUser> _signInManager;
    private readonly IEmailSender _emailSender;
    private readonly ISmsSender _smsSender;
    private readonly ApplicationDbContext _applicationDbContext;
    private static bool _databaseChecked;

    public AccountController(
        UserManager<ApplicationUser> userManager,
        SignInManager<ApplicationUser> signInManager,
        IEmailSender emailSender,
        ISmsSender smsSender,
        ApplicationDbContext applicationDbContext)
    {
        _userManager = userManager;
        _signInManager = signInManager;
        _emailSender = emailSender;
        _smsSender = smsSender;
        _applicationDbContext = applicationDbContext;
    }

    //
    // GET: /Account/Login
    [HttpGet]
    [AllowAnonymous]
    public IActionResult Login(string returnUrl = null)
    {
        ViewData["ReturnUrl"] = returnUrl;
        return View();
    }
  ...
  }

The login view has an inject keyword like:

@model LoginViewModel
@inject SignInManager<ApplicationUser> SignInManager

@{
   ViewData["Title"] = "Log in";

 }

However, I don't see this in other views, and there's no trace of Ninject nor Unity in the app. What is this? a new amazing feature?

Answer 1

Asp.net 5 comes with built-in dependency injection and many features around it. In your example you are injecting an instance of SignInManager<ApplicationUser> named SignInManager into the razor view.

You can now use it just like you'd normally use the Model property: @SignInManager.Method()

See this article for more information: http://blog.tomasjansson.com/asp-net-5-ioc-and-dependency-injection/