How to extend available properties of User Identity

Question

I m using MVC5 Identity 2 0 for users to log into my website  where the authentication details are stored in an SQL database  Asp net Identity has been implemented in a standard way as can be found in many online tutorials   The ApplicationUser class in IdentityModels has been extended to include some custom properties  such as an integer OrganizationId  The idea is that many users can be created and assigned to a common Organization for database relationship purposes   public class ApplicationUser   IdentityUser               public async Task lt ClaimsIdentity gt  GenerateUserIdentityAsync UserManager lt ApplicationUser gt  manager                           Note the authenticationType must match the one defined in CookieAuthenticationOptions AuthenticationType             var userIdentity   await manager CreateIdentityAsync this  DefaultAuthenticationTypes ApplicationCookie                  Add custom user claims here             return userIdentity                       Extended Properties         public DateTime  BirthDate   get  set            public long  OrganizationId   get  set               Key Mappings          ForeignKey  OrganizationId            public virtual Organization Organization   get  set            How can I retrieve the OrganizationId property of the currently logged in user from within a controller   Is this available via a method once a user is logged in or do I always have the retrieve the OrganizationId from the database  based on the UserId  every time a controller method executes   Reading around on the web I have seen I need to use the following to get the logged in UserId etc   using Microsoft AspNet Identity      User Identity GetUserId      However  OrganizationId is not a property available in User Identity  Do I need to extend User Identity to include the OrganizationId property  If so  how do I go about this   The reason I need the OrganizationId so often is that many table queries are reliant on the OrganizationId to retrieve data relevant to the Organization that s associated to the logged in user

User · Answer

Dhaust gives a good way to add the property to the ApplicationUser class. Looking at the OP code it appears they may have done this or were on track to do that. The question asks

How can I retrieve the OrganizationId property of the currently logged in user from within a controller? However, OrganizationId is not a property available in User.Identity. Do I need to extend User.Identity to include the OrganizationId property?

Pawel gives a way to add an extension method that requires using statements or adding the namespace to the web.config file.

However, the question asks if you "need to" extend User.Identity to include the new property. There is an alternative way to access the property without extending User.Identity. If you followed Dhaust method you can then use the following code in your controller to access the new property.

ApplicationDbContext db = new ApplicationDbContext();
var manager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(db));
var currentUser = manager.FindById(User.Identity.GetUserId());
var myNewProperty = currentUser.OrganizationId;

User · Answer

Check out this great blog post by John Atten  ASP NET Identity 2 0  Customizing Users and Roles  It has great step-by-step info on the whole process   Go read it      Here are some of the basics   Extend the default ApplicationUser class by adding new properties  i e - Address  City  State  etc     public class ApplicationUser   IdentityUser       public async Task lt ClaimsIdentity gt       GenerateUserIdentityAsync UserManager lt ApplicationUser gt  manager                var userIdentity   await manager CreateIdentityAsync this   DefaultAuthenticationTypes ApplicationCookie           return userIdentity            public string Address   get  set        public string City   get  set        public string State   get  set            Use a sensible display name for views       Display Name    Postal Code        public string PostalCode   get  set            Concatenate the address info for display in tables and such      public string DisplayAddress               get                       string dspAddress   string IsNullOrWhiteSpace this Address         this Address              string dspCity   string IsNullOrWhiteSpace this City         this City              string dspState   string IsNullOrWhiteSpace this State         this State              string dspPostalCode   string IsNullOrWhiteSpace this PostalCode         this PostalCode               return string Format   0   1   2   3    dspAddress  dspCity  dspState  dspPostalCode                     Then you add your new properties to your RegisterViewModel          Add the new address properties      public string Address   get  set        public string City   get  set        public string State   get  set      Then update the Register View to include the new properties        lt div class  form-group  gt           Html LabelFor m   gt  m Address  new    class    col-md-2 control-label              lt div class  col-md-10  gt               Html TextBoxFor m   gt  m Address  new    class    form-control              lt  div gt       lt  div gt    Then update the Register   method on AccountController with the new properties          Add the Address properties      user Address   model Address      user City   model City      user State   model State      user PostalCode   model PostalCode

User · Answer

Whenever you want to extend the properties of User Identity with any additional properties like the question above  add these properties to the ApplicationUser class first like so   public class ApplicationUser   IdentityUser       public async Task lt ClaimsIdentity gt  GenerateUserIdentityAsync UserManager lt ApplicationUser gt  manager                   Note the authenticationType must match the one defined in CookieAuthenticationOptions AuthenticationType         var userIdentity   await manager CreateIdentityAsync this  DefaultAuthenticationTypes ApplicationCookie              Add custom user claims here         return userIdentity                Your Extended Properties     public long  OrganizationId   get  set        Then what you need is to create an extension method like so  I create mine in an new Extensions folder    namespace App Extensions       public static class IdentityExtensions               public static string GetOrganizationId this IIdentity identity                        var claim     ClaimsIdentity identity  FindFirst  OrganizationId                   Test for null to avoid issues during local testing             return  claim    null    claim Value   string Empty                      When you create the Identity in the ApplicationUser class  just add the Claim -  OrganizationId like so       public async Task lt ClaimsIdentity gt  GenerateUserIdentityAsync UserManager lt ApplicationUser gt  manager                   Note the authenticationType must match the one defined in CookieAuthenticationOptions AuthenticationType         var userIdentity   await manager CreateIdentityAsync this  DefaultAuthenticationTypes ApplicationCookie              Add custom user claims here   gt  this OrganizationId is a value stored in database against the user         userIdentity AddClaim new Claim  OrganizationId   this OrganizationId ToString               return userIdentity          Once you added the claim and have your extension method in place  to make it available as a property on your User Identity  add a using statement on the page file you want to access it   in my case  using App Extensions  within a Controller and  using  App Extensions withing a  cshtml View file   EDIT    What you can also do to avoid adding a using statement in every View is to go to the Views folder  and locate the Web config file in there   Now look for the  lt namespaces gt  tag and add your extension namespace there like so    lt add namespace  App Extensions    gt    Save your file and you re done  Now every View will know of your extensions   You can access the Extension Method   var orgId   User Identity GetOrganizationId

User · Answer

I was looking for the same solution and Pawel gave me 99  of the answer  The only thing that was missing that I needed for the Extension to display was adding the following Razor Code into the cshtml view  page    using programname Models Extensions  I was looking for the FirstName  to display in the top right of my NavBar after the user logged in   I thought I would post this incase it helps someone else  So here is my code   I created a new folder called Extensions Under my Models Folder  and created the new class as Pawel specified above  IdentityExtensions cs  using System Security Claims  using System Security Principal   namespace ProgramName Models Extensions       public static class IdentityExtensions               public static string GetUserFirstname this IIdentity identity                        var claim     ClaimsIdentity identity  FindFirst  FirstName                   Test for null to avoid issues during local testing             return  claim    null    claim Value   string Empty                      IdentityModels cs    public class ApplicationUser   IdentityUser          Extended Properties     public string FirstName   get  internal set        public string Surname   get  internal set        public bool isAuthorized   get  set        public bool isActive   get  set         public async Task lt ClaimsIdentity gt  GenerateUserIdentityAsync UserManager lt ApplicationUser gt  manager                   Note the authenticationType must match the one defined in CookieAuthenticationOptions AuthenticationType         var userIdentity   await manager CreateIdentityAsync this  DefaultAuthenticationTypes ApplicationCookie              Add custom user claims here         userIdentity AddClaim new Claim  FirstName   this FirstName             return userIdentity            Then in my  LoginPartial cshtml Under Views Shared Folders  I added  using ProgramName Models Extensions  I then added the change to the folling line of code that was going to use the Users First name after Logging in     Html ActionLink  Hello     User Identity GetUserFirstname           Index    Manage   routeValues  null  htmlAttributes  new   title    Manage      Perhaps this helps someone else down the line

User · Answer

For anyone that finds this question looking for how to access custom properties in ASP NET Core 2 1 - it s much easier  You ll have a UserManager  e g  in  LoginPartial cshtml  and then you can simply do  assuming  ScreenName  is a property that you have added to your own AppUser which inherits from IdentityUser     using Microsoft AspNetCore Identity   using  lt namespaceWhereYouHaveYourAppUser gt    inject SignInManager lt AppUser gt  SignInManager  inject UserManager lt AppUser gt  UserManager   if  SignInManager IsSignedIn User          lt form asp-area  Identity  asp-page   Account Logout  asp-route-returnUrl   Url Action  Index    Home   new   area                     method  post  id  logoutForm             class  form-inline my-2 my-lg-0  gt            lt ul class  nav navbar-nav ml-auto  gt               lt li class  nav-item  gt                   lt a class  nav-link  asp-area  Identity  asp-page   Account Manage Index  title  Manage  gt                      Hello    await UserManager GetUserAsync User   ScreenName                        lt  -- Original code  shows Email-Address   UserManager GetUserName User   -- gt                   lt  a gt               lt  li gt               lt li class  nav-item  gt                   lt button type  submit  class  btn btn-link nav-item navbar-link nav-link  gt Logout lt  button gt               lt  li gt           lt  ul gt        lt  form gt    else        lt ul class  navbar-nav ml-auto  gt           lt li class  nav-item  gt  lt a class  nav-link  asp-area  Identity  asp-page   Account Register  gt Register lt  a gt  lt  li gt           lt li class  nav-item  gt  lt a class  nav-link  asp-area  Identity  asp-page   Account Login  gt Login lt  a gt  lt  li gt       lt  ul gt

User · Answer

I also had added on or extended additional columns into my AspNetUsers table  When I wanted to simply view this data I found many examples like the code above with  Extensions  etc    This really amazed me that you had to write all those lines of code just to get a couple values from the current users   It turns out that you can query the AspNetUsers table like any other table    ApplicationDbContext db   new ApplicationDbContext     var user   db Users Where x   gt  x UserName    User Identity Name  FirstOrDefault

[asp.net-mvc] How to extend available properties of User.Identity

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