Find User ID from the login page

Question

User-1664485818 posted

Hi folks, how do you find the user ID from the Login page, any help much appreciated.

At the moment I'm saving the user name to a session, but I really need the User ID, code below;

        protected void LogIn(object sender, EventArgs e)
        {
            if (IsValid)
            {

                Session["UserName"] = UserName.Text;
            
                // Validate the user password
                var manager = new UserManager();
                ApplicationUser user = manager.Find(UserName.Text, Password.Text);
                if (user != null)
                {
                    IdentityHelper.SignIn(manager, user, RememberMe.Checked);
                    //IdentityHelper.RedirectToReturnUrl(Request.QueryString["ReturnUrl"], Response);

                    IdentityHelper.RedirectToReturnUrl("~/Garages/Bookings.aspx", Response);

                }
                else
                {
                    FailureText.Text = "Invalid username or password.";
                    ErrorMessage.Visible = true;
                    Response.Redirect("~/pages/AccessDenied.aspx");
                }
            }

Answer 1

User1633621018 posted

Hi Brucey,

Are you looking for this?

User.Identity.GetUserId();

Answer 2

User-1664485818 posted

Thanks PawanPal, I'm having a wee problem my session is empty, I'm trying to pass the UserID to the session, code below;

   protected void LogIn(object sender, EventArgs e)
        {
            if (IsValid)
            {

                 Session["UserName"] = User.Identity.GetUserId();

Answer 3

User614698185 posted

Hi brucey,

You could use HttpContext.User property to get or set security information for the current HTTP request.

You can call User.Identity.GetUserId after you login:

Session["UserName"] = System.Web.HttpContext.Current.User.Identity.GetUserId();

Best Regards,

Candice Zhou

Answer 4

User-1664485818 posted

Nope session still empty, any other ideas?

Answer 5

User1124521738 posted

Why on earth, since you are using the auth framework, would you want to put stuff into session that can easily get lost (app pools cycle and lose session, and also, if on a server farm with load balancers, rolling to another server will make you lose the values)?  Just use System.Web.HttpContext.Current.User.Identity.Name when you need the username.

In case the username doesn't validate, and you really need the info to be in session, don't set it until after the "if (user != null)" test, else you've assigned session to whatever is in UserName.Text which could be garbage since this is prior to validating the username/password.

Note your key is called username, but you have been talking about user id which is actually something completely different in the new auth framework.  If you want the actual User's ID rather than username, again, wait until after you've checked that user != null and then do the assignment: Session["UserId"] = user.Id;

Answer 6

User-1664485818 posted

Thanks ninianner,

I never really thought about "lose session, and also, if on a server farm with load balancers, rolling to another server will make you lose the values"

Point noted..

NB: I have tried to pass the Userid to a session within the login.aspx, for some reason this will not work, the following code works ok in other pages!!

Session["Userid"] = System.Web.HttpContext.Current.User.Identity.GetUserId();