public static void updateComprar(MATERIAL_FALTANTE mat_upd)
        {
            using (BODEXDataContext ctx = new BODEXDataContext())
            {
                MATERIAL_FALTANTE material = (from mat in CRUD_Material.getAllComprar()
                                              where mat.M_ID.Equals(mat_upd.M_ID)
                                              select mat).First <MATERIAL_FALTANTE>();

                material.M_CANTIDAD = mat_upd.M_CANTIDAD;
                ctx.SubmitChanges();
            }
        }
        public static void updateComprar(MATERIAL_FALTANTE mat_upd)
        {
            using (BODEXDataContext ctx = new BODEXDataContext())
            {
                MATERIAL_FALTANTE material = (from mat in CRUD_Material.getAllComprar()
                               where mat.M_ID.Equals(mat_upd.M_ID)
                               select mat).First<MATERIAL_FALTANTE>();

                material.M_CANTIDAD = mat_upd.M_CANTIDAD;
                ctx.SubmitChanges();
            }
        }