user3378165 user3378165 - 1 year ago 237
C# Question

How to extend IdentityUser with custom property

I'm using Identity 2.0 for users to log into my website, where the authentication details are stored in an SQL database. Identity has been implemented in a standard way as can be found in many online tutorials.


class in
has been extended to include a custom property:

public class ApplicationUser : IdentityUser
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager, string authenticationType)
var userIdentity = await manager.CreateIdentityAsync(this, authenticationType);
return userIdentity;
//My extended property
public string Code { get; set; }

When I register a new user I pass the
custom property in the
but I'm not sure how to insert this custom property to the WebUsers table.

I did as bellow but it doesn't actually inserting this property to the table together with the username and password.

var user = new ApplicationUser() { UserName = userName, Email = model.Email, Code=model.Code };

And the entire function:

public async Task<IHttpActionResult> Register(RegisterBindingModel model)
if (!ModelState.IsValid)
return BadRequest(ModelState);

var userName = !string.IsNullOrEmpty(model.UserName) ? model.UserName : model.Email;
//I set it here but it doesn't get inserted to the table.
var user = new ApplicationUser() { UserName = userName, Email = model.Email, Code=model.Code };

IdentityResult result = await UserManager.CreateAsync(user, model.Password);

if (!result.Succeeded)
return GetErrorResult(result);

return Ok();

What am I missing?
I was looking at similar questions but couldn't find an answer for this.

Answer Source

If you follow all steps of adding a custom field to user, you will finish the tasks successfully.

Here is all steps to add a custom field to user:

  1. Create an ASP.NET Web Application
  2. Make sure you select MVC and the Authentication is Individual User Accounts
  3. Go to Models folder → Open IdentityModels.csApplicationUser class and add the property:

    public string Code { get; set; }
  4. Build the project
  5. Go to TOOLS menu → Nuget Package Manager → click Package Manager Console
  6. Type Enable-Migrations and press Enter and wait until the task get completed. You will see a response which says:

       Checking if the context targets an existing database...
       Code First Migrations enabled for project WebApplication1.
  7. Type Add-Migration "Code" and press Enter and wait until the task get completed. You will see a response which says:

    Scaffolding migration 'Code'. The Designer Code for this migration
    file includes a snapshot of your current Code First model. This
    snapshot is used to calculate the changes to your model when you
    scaffold the next migration. If you make additional changes to your
    model that you want to include in this migration, then you can
    re-scaffold it by running 'Add-Migration Code' again.
  8. Type Update-Database and press Enter and wait until the task get completed. You will see a response which says:

    Specify the '-Verbose' flag to view the SQL statements being applied 
    to the target database.
    Applying explicit migrations: [201611132135242_Code].
    Applying explicit migration: 201611132135242_Code.
    Running Seed method.

    At this step if you refresh SQL Server Object Explorer and go to database and see tables, under dbo.AspNetUsers under columns, you will see the Code field. If you didn't know which database or even which server you should look for, open Web.Config file and take a look at connection string which is something like this:

    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;AttachDbFilename=|DataDirectory|\aspnet-WebApplication1-20161114125903.mdf;Initial Catalog=aspnet-WebApplication1-20161114125903;Integrated Security=True"
    providerName="System.Data.SqlClient" />

    You can see data source (which is sql server instance) and something .mdf which is database name.

  9. Go to Models folder → Open AccountViewModels.cs file → RegisterViewModel class and add this property:

    public string Code { get; set; }
  10. Go to Views folder → Account folder → Open Register.cshtml file and add this code near other fields, for example below password:

    <div class="form-group">
        @Html.LabelFor(m => m.Code, new { @class = "col-md-2 control-label" })
        <div class="col-md-10">
            @Html.TextBoxFor(m => m.Code, new { @class = "form-control" })
  11. Go to Controllers folder → Open AccountController.cs file → in http post Register action, change the line which creates user to this:

    var user = new ApplicationUser { UserName = model.Email, Email = model.Email,
        Code= model.Code };
  12. Run project and go to /Account/Register url and register a new user. After registering the user, if you go to database again and View Data of dbo.AspNetUsers table, you will see the code has been saved.

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