AspNetRoles table not showing custom fields - asp.net

Question

I have recently extended my AspNetRoles table like this:
public class AspNetRoles:IdentityRole
{
public AspNetRoles() : base() { }
public String Label { get; set; }
public String ApplicationId { get; set; }
public AspNetApplications Application { get; set; }
public static readonly String SystemAdministrator = "SystemAdministrator";
}
It works fine when I create a new role. However, when I try to extract it to a list like this:
var data = dbContext.Roles.ToList();
And try to do a search like this:
data = data.Where(u => u.Id.ToString().ToLower().Contains(Input.Search.ToLower())).ToList();
I can't access the ApplicationId column. Am I missing something?
EDIT:
My dbContext
public class ApplicationDbContext : IdentityDbContext<ApplicationUser, AspNetRoles<string>, string>
{
public virtual DbSet<AspNetUsersExtendedDetails> AspNetUsersExtendedDetails { get; set; }
public virtual DbSet<AspNetApplications> AspNetApplications { get; set; }
public virtual DbSet<AspNetEventLogs> AspNetEventLogs { get; set; }
public virtual DbSet<AspNetRoles> AspNetRoles { get; set; }
public ApplicationDbContext() : base("AppStudio")
{
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
}
I have updated my dbContext but now it shows this error: 'IdentityDbContext<ApplicationUser, AspNetRoles<string>, string>' does not contain a constructor that takes 2 arguments

Answer 1

You need to tell ASP.Net Identity about the custom role table that you want to use.
Edit: since the default IdentityRole implementation uses a string as the PK, the type can be omitted. Just checking futher on ASP.Net Identity version 2, as soon as you specify a custom IdentityRole class, the class declaration needs to include all types.
That means you need to declare your ApplictionDbContext like this:
public class ApplicationDbContext: IdentityDbContext<ApplicationUser, AspNetRoles, string, IdentityUserLogin, IdentityUserRole, IdentityUserClaim>
{
public ApplicationDbContext() : base("AppStudio")
{
//note: before this change, if you included the
//throwIfV1Schema parameter in the constructor,
//it needs to be removed.
}
//implementation
}
Note that this assumes that the Primary Key of the users table is a string. If this is not the case, substitute with the applicable type (e.g. a Guid).

Answer 2

You have to add AspNetRoles to your IdentityDbContext.
public class ApplicationDbContext : IdentityDbContext<ApplicationUser, AspNetRoles, string>
{
public virtual DbSet<AspNetUsersExtendedDetails> AspNetUsersExtendedDetails { get; set; }
public virtual DbSet<AspNetApplications> AspNetApplications { get; set; }
public virtual DbSet<AspNetEventLogs> AspNetEventLogs { get; set; }
public ApplicationDbContext() : base("AppStudio", throwIfV1Schema: false)
{
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
}