public virtual ActionResult UserRoles(SelectUserRolesViewModel model)
 {
     if (ModelState.IsValid)
     {
         var idManager = DependencyResolver.Current.GetService<IIdentityManager>();
         var userId = idManager.GetUserId(model.UserName);
         idManager.ClearUserRoles(userId);
         foreach (var role in model.Roles)
         {
             if (role.Selected)
             {
                 idManager.AddUserToRole(userId, role.RoleName);
             }
         }
         return RedirectToAction("index");
     }
     return View();
 }
 public virtual ActionResult UserRoles(string id)
 {
     var Db = new PortalDbContext();
     var user = Db.Users.First(u => u.UserName == id);
     var model = new SelectUserRolesViewModel(user);
     return View(model);
 }