public ActionResult GetDataByBookNumber(string BookNumber) { MainApplication model = new MainApplication(); model.CatalogueList = _CatalogueService.GetDataByBookNumber(BookNumber); Session["CatalogueList"] = model.CatalogueList; Session["count"] = model.CatalogueList.Count(); List <int> ids = new List <int>(); foreach (var data in model.CatalogueList) { ids.Add(data.Id); } Session["ids"] = ids; return(View(model)); }