public ActionResult RoleAddUser(RoleModel model) { if (String.IsNullOrEmpty(model.NewUserId)) { ModelState.AddModelError("NewUserId", "The New User field is required."); } Helper.ForceValidation(ModelState, model); UserRole role = model.Role; if (ModelState.IsValid) { if (!String.IsNullOrEmpty(model.NewUserId)) { SecurityData.AddUserToRole(new Guid(model.NewUserId), role.RoleName); } return RedirectToAction("RoleAddEdit", new { @id = role.RoleId }); } Helper.HandleErrorDict(ModelState); model.LoadUsers(); return View("RoleAddEdit", model); }