public ActionResult MasterGridViewPartialAddNew(dnGroupMVC01.Areas.DemoClientSideShowHide.Models.Master item) { var model = MasterList.GetData(); if (ModelState.IsValid) { try { // Insert here a code to insert the new item in your model MasterList.AddItem(item); } catch (Exception e) { ViewData["EditError"] = e.Message; } } else { ViewData["EditError"] = "Please, correct all errors."; } return(PartialView("_MasterGridViewPartial", model)); }