How to login using email in identity 2?

Question

In MVC5 Identity 2 SignInManager.PasswordSignInAsync take user name for login.

var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false); 

but my user name and email are not same. but i want to email address for login.So how can i do that? Thanks

Answer 1

Get user from UserManager by email.

var user = UserManager.FindByEmail(email); 

Then use SignInManager's PasswordSignInAsync with user's Username

var result = await SignInManager .PasswordSignInAsync(user.UserName,password,isPersistent,shouldLockout); 

Or inside your SignInManager add this method (ASP.NET Identity discussion)

public async Task<SignInStatus> PasswordEmailSignInAsync(string email, string password, bool isPersistent, bool shouldLockout) {       var user =  UserManager.FindByEmail(email);       return await PasswordSignInAsync(user.UserName,password,isPersistent,shouldLockout); } 

Then use it same as PasswordSignInAsync but with user email instead of usermane.

Answer 2

We wanted to be able to allow our users to login via Username OR Email. This is how we set it up:

var isEmail = ValidationManager.IsValidEmailAddress(model.Username);  SignInStatus result = SignInStatus.Failure;  if (!isEmail)    {        result = await SignInManager.PasswordSignInAsync(model.Username, model.Password, model.RememberMe, false);    }    else    {        var user = await UserManager.FindByEmailAsync(model.Username);        if (user != null)            result = await SignInManager.PasswordSignInAsync(user.UserName, model.Password, model.RememberMe, false);    } 

IsValidEmailAddress is a customized variant of the property decoration [EmailAddress] validation attribute, we didn't use the built in one because it doesn't impose a length check on the TLD and allows email addresses like [email protected]

public static bool IsValidEmailAddress(string email)     {         if (string.IsNullOrEmpty(email))             return false;          var pattern = GlobalConstants.EMAIL_VALIDATION_PATTERN;         const RegexOptions options = RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.ExplicitCapture;          var emailValidator = new Regex(pattern,options);          return emailValidator.IsMatch(email);     } 

The RegEx pattern:

public const string EMAIL_VALIDATION_PATTERN = @"^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))){2,63}\.?$";