public IHttpActionResult GetImageById(int id)
        {
            COMimage img = BLLimage.GetImageById(id);

            if (img == null)
            {
                return(BadRequest("image does not exist"));
            }
            return(Ok(img));
        }
        public IHttpActionResult PostImage([FromBody] COMimage img)
        {
            COMimage im = BLLimage.GetImageById(img.ImageID);

            if (im != null)
            {
                return(BadRequest("image already exist"));
            }
            BLLimage.AddImage(img, Form1.categoriesCounter, Form1.voicesCounter);
            return(Ok());
        }