private string RouteExistingRegistration(OnlineRegModel m, int? pid = null) { var existingRegistration = m.GetExistingRegistration(pid ?? Util.UserPeopleId ?? 0); if (existingRegistration == null) return null; m.Log("Existing"); TempData["PeopleId"] = existingRegistration.UserPeopleId; return "/OnlineReg/Existing/" + existingRegistration.DatumId; }