从Hangfire Job获取UserManager

Question

I am using Hangfire to run background jobs, as part of one of those jobs I want to be able to send emails. I would like to use the mechanism I have in the rest of my application namely using UserManager.SendMailAsync. The difficulty I have is being able to create a reference to the OwinContext or UserManager inside a hangfire tasks.

Code like:

HttpContext.Current.GetOwinContext()

Will just fail with an error. As per the hangfire documentation I have create an authorization filter which can successfully attach to the OwinContext, however I cannot seem to be find a way to do this inside a hangfire task.

I've also tried the following:

 var context = new OwinContext();
            var aaa = context.GetUserManager<ApplicationUserManager>();

I can never get a reference to the user manager

Answer 1

var userManager = new ApplicationUserManager(
    new UserStore<ApplicationUser>(new ApplicationDbContext()));

Then do what you want on this userManager .

NOTE

Be Careful when use this trick, you must make sure your code won't take different UserManager instance to update(user). for example:

/* Wrong demonstration */

var userManagerA = new ApplicationUserManager(new UserStore<ApplicationUser>(new ApplicationDbContext()));
var userFormA = userManagerA.FindByName(User.Identity.Name);
userFormA.EmailConfirmed = false;
// some stuff ...

var userManagerB = new ApplicationUserManager(new UserStore<ApplicationUser>(new ApplicationDbContext()));
// Will product a Exception from EntityFramework
userManagerB.Update(userFormA);