public async Task <IActionResult> OnGetAsync(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            StocklistImport = await _context.StocklistImport
                              .Include(m => m.Photo)
                              .FirstOrDefaultAsync(m => m.StocklistImportID == id);

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

            return(Page());
        }