.SendMailAsync() use in MVC

Question

I am trying to send email from my MVC application, it sends fine when I use the .Send() method but takes a while to come back so I wanted to use the .SendMailAsync() functio

Answer 1

I think the below does what you're trying to accomplish:

Modify your controller as below:

public async Task Index()
{
    Email email = new Email();
    email.SendAsync();
}

And in your Email class add the SendAsync method as below

public async Task SendAsync()
{
    await Task.Run(() => this.send());
}

The action will return before the email is sent and the request will not be blocked.

Try to see the behaviour with default mvc template with this code:

[AllowAnonymous]
public ActionResult Login(string returnUrl)
{
    LongRunningTaskAsync();
    return View();
}

public static async Task LongRunningTaskAsync()
{
    await Task.Run(() => LongRunningTask());
}

public static void LongRunningTask()
{
    Debug.WriteLine("LongRunningTask started");
    Thread.Sleep(10000);
    Debug.WriteLine("LongRunningTask completed");
}

The login page will be displayed instantly. But output window will display "LongRunningTask completed" 10 seconds later.