public ActionResult Create(CADENA_LIBRERIAS cadena_librerias)
        {
            if (ModelState.IsValid)
            {
                db.CADENA_LIBRERIAS.Add(cadena_librerias);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(cadena_librerias);
        }
        public HttpResponseMessage PostCADENA_LIBRERIAS(CADENA_LIBRERIAS cadena_librerias)
        {
            if (ModelState.IsValid)
            {
                db.CADENA_LIBRERIAS.Add(cadena_librerias);
                db.SaveChanges();

                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, cadena_librerias);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = cadena_librerias.ID_LIBRERIA }));
                return response;
            }
            else
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }
        }
        public HttpResponseMessage PutCADENA_LIBRERIAS(int id, CADENA_LIBRERIAS cadena_librerias)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            if (id != cadena_librerias.ID_LIBRERIA)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }

            db.Entry(cadena_librerias).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException ex)
            {
                return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
            }

            return Request.CreateResponse(HttpStatusCode.OK);
        }
 public ActionResult Edit(CADENA_LIBRERIAS cadena_librerias)
 {
     if (ModelState.IsValid)
     {
         db.Entry(cadena_librerias).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(cadena_librerias);
 }