ASP.NET Core Identity InvalidUserName

Question

I am working on an ASP.NET Core 6 MVC application that uses ASP.NET Core Identity. When I try to create a new user using the UserManager, I get this error:

User name ' ' is invalid, can only contain letters or digits.

Username do not has any whitespace.

When I try to create new user I get the error:

var user = new User
{
    Name = "my name",
    UserName = "GoodName",
    Email = "[email protected]",
    EmailConfirmed = true
};

var result = await _userManager.CreateAsync(user, "123723-Aa");

Code in program file:

builder.Services.AddIdentity<User, Role>(options =>
{
// User settings.
    options.User.AllowedUserNameCharacters =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._@+";
    options.User.RequireUniqueEmail = false;
})
.AddEntityFrameworkStores<School.Database.SchoolContext>()
.AddUserManager<UserManager<User>>()
.AddClaimsPrincipalFactory<ApplicationUserClaimsPrincipalFactory>()
.AddDefaultTokenProviders();

This is repo link:

https://github.com/MrMustafa-2/TestProject.git

And when you run the project go to this url:

/Account/Register

Then you can see the error at the Breakpoint I mark it

I am waiting ...

Thanks

Answer 1

Since there is a custom UserName field in APPUser, this causes a duplication with the UserName of identityUser, so an invalid error occurs. You can add an override attribute to Appuser to avoid this error, such as:

public class AppUser : IdentityUser<string>
{
   
    public override string UserName { get; set; } = null!;
}

When I reinsert the data:

public async Task<IActionResult> Register()
{
    var user = new AppUser
    {
        Id="1",
        UserName = "johndoekk",
        Email = "[email protected]",
        FirstName = "Jonhn",
        LastName = "Dnoe",
        Name = "John Dnoe"
    };

    var result = await _userManager.CreateAsync(user, "123123-Aa");

    int sfd = 4;

    if (result.Succeeded)
    {
        //await SignInManager.SignInAsync(user, isPersistent: false);
        return RedirectToAction("Index", "Home");
    }

    return Ok();
}