/// <summary>
/// 获取商品赠品
/// </summary>
/// <param name="itemId"></param>
/// <returns></returns>
public IEnumerable <ItemGifts> GetItemGiftsByItemId(int itemId)
{
if (itemId <= 0)
{
return(null);
}
var result = _dal.GetItemGiftsByItemId(itemId);
return(result);
}