C3rd

Use Email as Username with ASP.NET Membership
Posted: 27 Dec 2012, 5:16am - Thursday

Couple of guides in the internet on using email as username with the ASP.NET Membership but the guide is too long and its a maze and crazy as hell for me. I found my own answer as simple as I wanted to. In my case, I created my own form. Form (View): 

            <form action="/home/authenticate" method="post" name="login">
                <label>Email</label>
                <input type="text" name="email" />
                <br class="clear" />
                <label>Password</label>
                <input type="password" name="passwd" />
                <br class="clear" />
                <input type="submit" name="submit" value="Login" />
            </form>
  Authentication (Controller): 
        [HttpPost]
        public ActionResult Authenticate()
        {
            Regex regex_email = new Regex(@"^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$");

            var email = Request.Form["email"];
            var passwd = Request.Form["passwd"].Trim();

            if ((!regex_email.IsMatch(email)) || (passwd.Length < 6))
            {
                return RedirectToAction("Index", "Home", new {
                    msg = "Invalid username or password!"
                });
            }
            else 
            {
                string username = Membership.GetUserNameByEmail(email);

                if (Membership.ValidateUser(username, passwd))
                {
                    FormsAuthentication.SetAuthCookie(username, true);
                    return RedirectToAction("Index", "Project");
                }
                else
                {
                    return RedirectToAction("Index", "Home", new {
                        msg = "Invalid username or password!"
                    });
                }
            }
        }
  I just call the Membership.GetUserNameByEmail() then validate with Membership.ValidateUser(). That's it! Hope this help to others too.. :)

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