Does Indentiy in ASP.NET MVC core provide an easy way to access the UserId from any page ?

Question

Or do I need to set up Sessions in ASP.NET and get the user ID and pass it around manually like... ?

  public async Task<IActionResult> Login(LoginViewModel model, string returnUrl = null)
    {
        ViewData["ReturnUrl"] = returnUrl;

        //Save UserId in session
        HttpContext.Session.SetString("UserIdKey", "123");
        ViewData["UserId"] = HttpContext.Session.GetString("UserIdKey");

....

Via the `UserManager` would seem to be the way in .net Core - see [ASP.NET Core Identity - get current user](https://stackoverflow.com/questions/38751616/asp-net-core-identity-get-current-user) — SpruceMoose, Apr 20 '18 at 10:36

SpruceMoose · Answer 1 · 2018-08-29T12:02:06.133

2

Assuming that you have injected a UserManager, as of 2.1 you can use:

string userid = _userManager.GetUserId(userPrincipal);

Where userPrincipal can be provided by the ControllerBase.User Property.

edited Aug 29 '18 at 12:02

answered Apr 20 '18 at 10:40

SpruceMoose

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score 2 · Accepted Answer · answered Apr 26 '18 at 05:54

Use Extension

    public static class IdentityExtension
    {
        public static string GetId(this IIdentity identity)
        {
            ClaimsIdentity claimsIdentity = identity as ClaimsIdentity;

            Claim claim = claimsIdentity.FindFirst(ClaimTypes.NameIdentifier);

            return claim.Value;
        }
    }

Example

User.Identity.GetId()

Does Indentiy in ASP.NET MVC core provide an easy way to access the UserId from any page ?

2 Answers2