// PUT api/Admin/5
        public IHttpActionResult PutPhoto(int id, Photo photo)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != photo.Id)
            {
                return BadRequest();
            }

            data.Photos.Update(photo);

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

            return StatusCode(HttpStatusCode.NoContent);
        }
        public IHttpActionResult PostPhoto(Photo photo)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            data.Photos.Add(photo);
            data.SaveChanges();

            return CreatedAtRoute("DefaultApi", new { id = photo.Id }, photo);
        }