public IHttpActionResult PutContact(int id, Contacts_tbl contact)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (id != contact.Code)
            {
                return(BadRequest());
            }

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

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

            return(StatusCode(HttpStatusCode.NoContent));
        }
        public IHttpActionResult GetContact(int id)
        {
            Contacts_tbl contact = db.Contacts_tbl.Find(id);

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

            return(Ok(contact));
        }
        public IHttpActionResult PostContact(Contacts_tbl contact)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            db.Contacts_tbl.Add(contact);
            db.SaveChanges();

            return(CreatedAtRoute("DefaultApi", new { id = contact.Code }, contact));
        }
        public IHttpActionResult DeleteContact(int id)
        {
            Contacts_tbl contact = db.Contacts_tbl.Find(id);

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

            db.Contacts_tbl.Remove(contact);
            db.SaveChanges();

            return(Ok(contact));
        }