How to get User Information after login in ASP.NET Core3.1

Question

I am trying to get user information after login in ASP.NET Core 3.1 (information like name, email, id, ...).

Here is my code in login action

var claims = new List<Claim>()
{
    new Claim(ClaimTypes.NameIdentifier, "NameIdentifire"),
    new Claim(ClaimTypes.Name, "Name"),
    new Claim(ClaimTypes.Email, "Email")
};

var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);

var principal = new ClaimsPrincipal(identity);

HttpContext.SignInAsync(principal);

In the views I only access the name by looking at @User.Identity.Name. My question is: how to get other information user in different views?

Answer 1

You can create an helper class like this one:

internal static class ClaimsPrincipalExtensions
{
    internal static string GetEmail(this ClaimsPrincipal claimsPrincipal)
        => claimsPrincipal.FindFirstValue(ClaimTypes.Email);

    internal static string GetFirstName(this ClaimsPrincipal claimsPrincipal)
        => claimsPrincipal.FindFirstValue(ClaimTypes.Name);

    internal static string GetLastName(this ClaimsPrincipal claimsPrincipal)
        => claimsPrincipal.FindFirstValue(ClaimTypes.Surname);

    internal static string GetPhoneNumber(this ClaimsPrincipal claimsPrincipal)
        => claimsPrincipal.FindFirstValue(ClaimTypes.MobilePhone);

    internal static string GetUserId(this ClaimsPrincipal claimsPrincipal)
       => claimsPrincipal.FindFirstValue(ClaimTypes.NameIdentifier);
}

and use it like:

_profileModel.Email = user.GetEmail();
_profileModel.FirstName = user.GetFirstName();
_profileModel.LastName = user.GetLastName();
_profileModel.PhoneNumber = user.GetPhoneNumber();

This code is from a Blazor WASM application, but the code is about the same for ASP.NET Core.