public int Edit(Vaitro vt)
        {
            Vaitro vts = tb.Vaitro.Find(vt.Idvaitro);

            vts.Tenvaitro = vt.Tenvaitro;
            try
            {
                tb.Entry(vts).State = EntityState.Modified;
                tb.SaveChanges();
                return(1);
            }
            catch
            {
                throw;
            }
        }
        public int Create([FromBody] Vaitro vt)
        {
            vt.Idvaitro = Auto_id();

            tb.Vaitro.Add(vt);
            try
            {
                if (ModelState.IsValid)
                {
                    tb.SaveChanges();
                }
                return(1);
            }
            catch (DbUpdateException)
            {
                throw;
            }
        }
        public int Delete(string id)
        {
            try
            {
                Vaitro vt = tb.Vaitro.Find(id);

                if (vt != null)
                {
                    tb.Vaitro.Remove(vt);
                    tb.SaveChanges();
                    return(1);
                }
                else
                {
                    return(0);
                }
            }
            catch
            {
                throw;
            }
        }