public IHttpActionResult themHinh([FromBody] hinhAnh hinh)
        {
            try
            {
                if (db.SanPhams.FirstOrDefault(e => e.id_san_pham == hinh.idSanpham) == null)
                {
                    return(StatusCode(HttpStatusCode.NotFound));
                }

                for (int i = 0; i < hinh.base64.Count; i++)
                {
                    HinhSP hinhTam = new HinhSP();
                    hinhTam.id_sp = hinh.idSanpham;

                    byte[]       imageBytes = Convert.FromBase64String(hinh.base64[i]);
                    MemoryStream ms         = new MemoryStream(imageBytes, 0, imageBytes.Length);
                    ms.Write(imageBytes, 0, imageBytes.Length);
                    System.Drawing.Image image = System.Drawing.Image.FromStream(ms, true);
                    string fileName            = hinh.idSanpham + "stt" + i + ".png";
                    image.Save(Path.Combine(System.Web.Hosting.HostingEnvironment.MapPath("~/hinh/SanPham"), fileName));

                    hinhTam.url_hinh = "~/hinh/SanPham/" + fileName;

                    db.HinhSPs.InsertOnSubmit(hinhTam);
                    db.SubmitChanges();
                }
                return(Ok());
            }
            catch (Exception ex)
            {
                return(BadRequest(ex.Message));
            }
        }
 public IHttpActionResult xoa(int idHinh)
 {
     try
     {
         HinhSP hinh = db.HinhSPs.FirstOrDefault(e => e.id_hinh == idHinh);
         if (hinh == null)
         {
             return(StatusCode(HttpStatusCode.NotFound));
         }
         db.HinhSPs.DeleteOnSubmit(hinh);
         db.SubmitChanges();
         return(Ok());
     }catch (Exception ex)
     {
         return(BadRequest(ex.Message));
     }
 }