public FileContentResult ListaArticulosExcel() { if (Session[_session_lista_articulos] == null) { List <Ent_Orce_Inter_Art> liststoreConf = new List <Ent_Orce_Inter_Art>(); Session[_session_lista_articulos] = liststoreConf; } List <Ent_Orce_Inter_Art> lista = (List <Ent_Orce_Inter_Art>)Session[_session_lista_articulos]; string[] columns = { "ARTICULO", "VALOR" }; byte[] filecontent = ExcelExportHelper.ExportExcel3(lista, "", false, columns); string nom_excel = "Lista de Articulos"; if (lista.Count > 0) { nom_excel = lista.First().ATRIBUTO; } return(File(filecontent, ExcelExportHelper.ExcelContentType, nom_excel + ".xlsx")); }