public ActionResult GetProductDeliverySet(int productId, int comboType, int oldProductId = 0)
 {
     IEnumerable<ProductDeliverySet> deliverySets;
     if (productId == 0)//臨時表
     {
         ProductDeliverySetTempMgr _productDeliverySetTempMgr = new ProductDeliverySetTempMgr(connectionString);
         deliverySets = _productDeliverySetTempMgr.QueryByProductId(new ProductDeliverySetTemp { Product_id = productId, Combo_Type = comboType, Writer_Id = ((Caller)Session["caller"]).user_id });
     }
     else//正式表
     {
         _productDeliverySetMgr = new ProductDeliverySetMgr(connectionString);
         deliverySets = _productDeliverySetMgr.QueryByProductId(productId);
     }
     return Json(deliverySets.Select(d => d.Freight_big_area + "|" + d.Freight_type));
 }