// POST api/grupo
        public HttpResponseMessage PostDetalle([FromBody] GrupoXProducto1 gp)
        {
            HttpResponseMessage response;

            try
            {
                GrupoService service = (GrupoService) new GrupoService().setDatabase(db);
                gp.FechaAlta   = DateTime.Today;
                gp.UsuarioAlta = 1;
                gp.Estado      = "A";
                gp             = service.saveOrUpdate1(gp);

                response = this.getSuccessResponse(gp);
            }
            catch (Exception e)
            {
                response = this.getErrorResponse(e);
            }
            return(response);
        }