在AccountController之外放置UserManager和UserStore？

Question

Is this good enough? Or do i have to dispose UserStore as well? If i do have to any suggestions would be welcome. I'm new to ASP.NET Identity.

using (var applicationDbContext = new ApplicationDbContext())
{
    using (var userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(applicationDbContext)))
    {

    }
}

This would be better i guess:

using (var applicationDbContext = new ApplicationDbContext())
{
    using (var userStore = new UserStore<ApplicationUser>(applicationDbContext))
    {
        using (var userManager = new UserManager<ApplicationUser>(userStore))
        {

        }
    }
}

EDIT: I'm glad that i asked this question, although i may have already answered my initial question. Thanks Glenn Ferrie, will check out the ASP.NET dependency injection.

Answer 1

This is a few code snippets from a new ASP.NET MVC (.NET 4.6) created with VS 2015 RC. First the Startup class:

public partial class Startup
{
    // For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
    public void ConfigureAuth(IAppBuilder app)
    {
        // Configure the db context, user manager and signin manager to use a single instance per request
        app.CreatePerOwinContext(ApplicationDbContext.Create);
        app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
        app.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create);
// rest of implementation ommitted for brevity.

then here is how you access it in a Controller class:

public class AccountController : Controller
{
    private ApplicationSignInManager _signInManager;
    private ApplicationUserManager _userManager;

    public AccountController()
    {
    }

    // NOTE: ASP.NET will use this contructor and inject the instances
    // of SignInManager and UserManager from the OWIN container
    public AccountController(ApplicationUserManager userManager, ApplicationSignInManager signInManager )
    {
        UserManager = userManager;
        SignInManager = signInManager;
    }
    // there are implementations for the public properties
    // 'UserManager' and 'SignInManager' in the boiler plate code
    //  not shown here

Happy Coding!