Change username in MVC 5

问题

I am using ASP.NET MVC5 and Identity 2.0 (beta).

It is possible for users to change the username?

I am trying using UserManager.UpdateAsync method throws an exception.

Regrads,

Fran.

回答1:

Yes it is possible using the UpdateAsync method but you need to ensure that you update both the email and username fields.

var user = userManager.FindById(userId);
user.Email = email;
user.UserName = email;

var updateResult = await userManager.UpdateAsync(user);

This method works successfully for me

回答2:

This works for me:

 public async Task<ActionResult> ChangeUsername(string value)
        {
            if (UserManager.Users.Where(x => x.UserName == value).FirstOrDefault() == null) //chk for dupes
            {
                var user = UserManager.FindById(User.Identity.GetUserId());
                user.UserName = value;
                var updateResult = await UserManager.UpdateAsync(user);
                store.Context.SaveChanges();

                await SignInAsync(user,true);//user is cached until logout so do this to clear cache                
                return Content("true");
            }
            throw new HttpException(500, "Please select a different username");
        }

回答3:

Maybe it's not so beautiful, but try this:

db.Database.ExecuteSqlCommand("update AspNetUsers set UserName=" + NewUserName + " where UserName = " + OldUserName);

来源：https://stackoverflow.com/questions/21748731/change-username-in-mvc-5