public ActionResult ListaBase(FormCollection form) { //string inicio = "", string fin = "", string resolucion = "" var inicio = form["txtDesde"]; var fin = form["txtHasta"]; var resolucion = form["txtResolucion"]; if (inicio == null && fin == null && resolucion == null) { ViewBag.Lista = GestionPedagogica.ListarBase(); return(PartialView()); } else if (inicio == "" && fin == "" && resolucion == "") { ViewBag.Lista = GestionPedagogica.ListarBase(); return(PartialView()); } else { ViewBag.Lista = GestionPedagogica.BuscarListaBase(inicio, fin, resolucion); return(PartialView()); } }