public ActionResult DeleteTrialCenter([DataSourceRequest] DataSourceRequest request, TrialCenter trialCenter)
        {
            if (trialCenter != null)
            {
                DataProvider.Delete(trialCenter);
            }

            return Json(new[] { trialCenter }.ToDataSourceResult(request, ModelState));
        }
        public ActionResult AddTrialCenter([DataSourceRequest] DataSourceRequest request, TrialCenter trialCenter)
        {
            if (trialCenter != null && ModelState.IsValid)
            {
                DataProvider.Add(trialCenter);
            }

            return Json(new[] { trialCenter }.ToDataSourceResult(request, ModelState));
        }