public ActionResult LibroComprasVentas(int?mes, int?gestion) { ViewBag.LibroCompras = reportesManager.GetReporteLibroCompras(mes != null ? mes.Value : 7, gestion != null ? gestion.Value : 2018); ViewBag.LibroVentas = reportesManager.GetReporteLibroVentas(mes != null ? mes.Value : 7, gestion != null ? gestion.Value : 2018); return(View()); }