public IHttpActionResult PutBaiVietGT(int id, BaiVietGT baiVietGT)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (id != baiVietGT.MaBVGT)
            {
                return(BadRequest());
            }

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

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!BaiVietGTExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(StatusCode(HttpStatusCode.NoContent));
        }
        public IHttpActionResult GetBaiVietGT(int id)
        {
            BaiVietGT baiVietGT = db.BaiVietGTs.Find(id);

            if (baiVietGT == null)
            {
                return(NotFound());
            }

            return(Ok(baiVietGT));
        }
        public IHttpActionResult PostBaiVietGT(BaiVietGT baiVietGT)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            db.BaiVietGTs.Add(baiVietGT);
            db.SaveChanges();

            return(CreatedAtRoute("DefaultApi", new { id = baiVietGT.MaBVGT }, baiVietGT));
        }
        public IHttpActionResult DeleteBaiVietGT(int id)
        {
            BaiVietGT baiVietGT = db.BaiVietGTs.Find(id);

            if (baiVietGT == null)
            {
                return(NotFound());
            }

            db.BaiVietGTs.Remove(baiVietGT);
            db.SaveChanges();

            return(Ok(baiVietGT));
        }