public IActionResult GetItem(int?id)
 {
     if (id == null)
     {
         return(BadRequest());
     }
     try
     {
         var data = acontext.GetItem(id);
         if (data == null)
         {
             return(NotFound());
         }
         return(Ok(data));
     }
     catch (Exception)
     {
         return(BadRequest());
     }
 }