public ActionResult SearchPatients(string firstName, string lastName, string practitionerId) { PatientsDirectorySearch search = new PatientsDirectorySearch(); search.FirstName = firstName; search.LastName = lastName; search.PractitionerId = Guid.Parse(practitionerId); List <PatientsDirectory> result = new List <PatientsDirectory>(); PractitionerProcess process = new PractitionerProcess(); result = process.SearchPatients(search); return(Json(result, JsonRequestBehavior.AllowGet)); }