How do I send a confirm email response? Mvc core

See more:

C#

MVC5

ASP.NET5

I have been trying to figure out the easiest way of sending a confirmation email for when a user signs in!

I am using MailKit and Mailtrap.io (Sqlite and EF).
Below I have an example of the way I am doing it, and I can copy this the same way I have created it below onto my user controller. (I will put in the "What have you tried user controller"

My serviceSb looks like This:

public bool SendMail(string name, string email, string subject, string body)
        {
            var mailMessage = new MimeMessage();
            mailMessage.From.Add(new MailboxAddress("TheMailTrap", "manager@TheMailTrap.com"));
            mailMessage.To.Add(new MailboxAddress(name, email));
            mailMessage.Subject = subject;
            mailMessage.Body = new TextPart("plain")
            {
                Text = body
            };

            try
            {
                var smtpClient = new SmtpClient();
                smtpClient.Connect("smtp.mailtrap.io", 2525, SecureSocketOptions.StartTls);
                smtpClient.Authenticate("61618d4d83c43242344d", "b5be3640923423434342f2afa"); // replace with your mailtrap.io credentials
                smtpClient.Send(mailMessage);
                smtpClient.Disconnect(true);
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }

My Controller:

<pre lang="C#">
 public IActionResult Create(Patient u)
        {
            if (svc.IsDuplicateEmailPatient(u.EmailAddress, u.Id))
            {
                //alerting the user that the email address is in use

                ModelState.AddModelError(nameof(u.EmailAddress), "The Email is already in use");
            }


            //Complete POST action and add the user 

            if (ModelState.IsValid)
            {
                svc.AddPatient(u);

                // send patient an email to confirm account. Add whatever message you want
                if (!svc.SendMail(u.Name, u.EmailAddress, "New Account", "THIS IS A TEST!!!! :D "))
                {
                    Alert("Email Not Sent", AlertType.warning);
                }
                else
                {
                    Alert("User Was Created. Email sent", AlertType.success); //alert successful
                }

                return RedirectToAction(nameof(Index));

      

            }

            return View(u); // Return if validation errors has occured 
        }

I am looking online at tutorials on how to do this but it is very different from the way I have been taught to implement this. I essentially want to make sure when someone registers into a particular role I want them to be made to wait before "Approved" by the manager - To make sure the role they register for is true!

However, if they register as a patient, for example, a confirmation email is sent and they can confirm it themselves.

Does anyone know the cleanest way of doing this? - My level of coding is a beginner and I have been losing days on looking at ways I think will work and then fails.

What I have tried:

Startup.cs

services.AddIdentity<User, IdentityRole>(opt =>
{
    opt.Password.RequiredLength = 7;
    opt.Password.RequireDigit = false;
    opt.Password.RequireUppercase = false;

    opt.User.RequireUniqueEmail = true;

    opt.SignIn.RequireConfirmedEmail = true;
});

User Controller - This is where I am not sure how to implement the code?

[HttpPost]
        [ValidateAntiForgeryToken]
        public IActionResult Register([Bind("Name,Email,Password,PasswordConfirm,Role")] UserRegisterViewModel m)       
        {
            if (!ModelState.IsValid)
            {
                return View(m);
            }
            // add user via service
            var user = _svc.AddUser(m.Name, m.Email,m.Password, m.Role);
            // check if error adding user and display warning

            if (user == null) {
                Alert("There was a problem Registering. Please try again", AlertType.warning);
                return View(m);
            }

            Alert("Successfully Registered. Now login", AlertType.info);

            return RedirectToAction(nameof(Login));
        }