public ActionResult PostComment(String name, String phone, String content, String productId)
 {
     CommentDto comment = new CommentDto();
     comment.Name = name;
     try
     {
         comment.ProductId = int.Parse(productId);
     }
     catch (Exception ex)
     {
         comment.ProductId = 0;
     }
     comment.Phone = phone;
     comment.Content = content;
     ProductHandler prodHandler = new ProductHandler();
     prodHandler.AddComment(comment);
     return RedirectToAction("ProductDetail", "Home", new { productCode = productId });
 }