MVC Identity 2.0 and Role Management

I have implemented Identity 2.0 Membership and now regret it. But, I'm so deep in this project, there is no turning point. My problem is probably simple for most, so hopefully I can get some help.

I have a grid control in my MVC5 application.

VIEW

@using System.Web.Helpers;
@model List<PTSPortal.Models.PTSUsersViewModel>
@{
    var grid = new WebGrid(source: Model, defaultSort: "PropertyName", rowsPerPage: 10);
 }
 <div id="ContainerBox">
    @grid.GetHtml(columns: grid.Columns(
            grid.Column("_email", "Email", canSort: true, style: "text-align-center"),
            grid.Column("_employeeID", "EmployeeID", canSort: true, style: "text-align-center"),
            grid.Column("_phoneNumber", "Phone", canSort: true, style: "text-align-center")
            //-----I want to display the user role here!------
        ))
</div>

      

        
        
        
      

    

ViewModel

public class PTSUsersViewModel
{
    public string _ID { get; set; }
    public string _email { get; set; }
    public int? _employeeID { get; set; }
    public string _phoneNumber { get; set; }
    public string _role { get; set; }
}

      

        
        
        
      

    

My goal is to show every registered user role using grid.Column, like email, employeeID and phone number.

CONTROLLER

public ActionResult PTSUsers()
{
        List<PTSUsersViewModel> viewModel = FetchInfo().ToList();
        return View(viewModel);
}

private static IEnumerable<PTSUsersViewModel> FetchInfo()
{

        PTSPortalEntities context = new PTSPortalEntities();

        using (ApplicationDbContext _context = new ApplicationDbContext())
        {
            var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(_context));
            var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(_context));

        }

        return (from a in context.AspNetUsers
                orderby a.Email ascending
                select new PTSUsersViewModel
                {
                    _ID = a.Id,
                    _email = a.Email,
                    _employeeID = a.EmployeeID,
                    _phoneNumber = a.PhoneNumber,
                    //_role = ........
                }).ToList<PTSUsersViewModel>();
}

      

        
        
        
      

    

In my usage instruction, I have var roleManager and var userManager, but they don't do anything. I was trying to get the user role, but when I stopped and thought I would turn to SOF for some advice or a better approach.

Now, on a side note. The project already has some maintenance methods that work great within other controller methods. Maybe they can be used or changed in my release above:

public class AppServices
{
    // Roles used by this application
    public const string AdminRole = "Admin";
    public const string TrainerRole = "Trainer";

    private static void AddRoles(ref bool DataWasAdded)
    {
        var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(new ApplicationDbContext()));

        if (roleManager.RoleExists(AdminRole) == false)
        {
            Guid guid = Guid.NewGuid();
            roleManager.Create(new IdentityRole() { Id = guid.ToString(), Name = AdminRole });
            DataWasAdded = true;
        }
        if (roleManager.RoleExists(TrainerRole) == false)
        {
            Guid guid = Guid.NewGuid();
            roleManager.Create(new IdentityRole() { Id = guid.ToString(), Name = TrainerRole });
            DataWasAdded = true;
        }
    }

    /// <summary>
    ///  Checks if a current user is in a specific role.
    /// </summary>
    /// <param name="role"></param>
    /// <returns></returns>
    public static bool IsCurrentUserInRole(string role)
    {
        if (role != null)
        {
            using (ApplicationDbContext _context = new ApplicationDbContext())
            {
                var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(_context));
                var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(_context));
                if (UserManager.IsInRole(GetCurrentUserID(), role))
                {
                    return true;
                }
            }
        }
        return false;
    }

    /// <summary>
    /// Adds a user to a role
    /// </summary>
    /// <param name="userId"></param>
    /// <param name="RoleToPlaceThemIn"></param>
    public static void AddUserToRole(string userId, string RoleToPlaceThemIn)
    {
        // Does it need to be added to the role?
        if (RoleToPlaceThemIn != null)
        {
            using (ApplicationDbContext _context = new ApplicationDbContext())
            {
                var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(_context));
                var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(_context));
                if (UserManager.IsInRole(userId, RoleToPlaceThemIn) == false)
                {
                    UserManager.AddToRole(userId, RoleToPlaceThemIn);
                }
            }
        }
    }

      

        
        
        
      

    

Any advice would be appreciated.