public void Save()

class MyPage : System.Web.UI.Page
{
    private string GetValue(XmlNode node, string value)
    {
	      if (node == null)  return string.Empty;
	
	      XmlNode n = node.SelectSingleNode(value);
	      if (n == null) return string.Empty;
	
       return Base.ChkString(n.InnerText).Trim();
   }
   
   public void SaveOrderLinesToDB(XmlNode orderLinesNode, eCommerce.Orders.Order order)
   {
        if (orderLinesNode == null || order == null || order.ID == null || order.ID.Length == 0)
        	   return;

        foreach (XmlNode o in orderLinesNode.SelectNodes("OrderLine"))
        {
            string OrderLineID = GetValue(o, "OrderLineID");
        	   eCommerce.Orders.OrderLine orderLine = eCommerce.Orders.OrderLine.Create(OrderLineID, order);

        	   orderLine.ID = OrderLineID;
        	   orderLine.OrderID = order.ID;
        	   orderLine.ParentLineID = GetValue(o, "OrderLineParentLineID");
        	   orderLine.BOM = Base.ChkBoolean(GetValue(o, "OrderLineBOM"));
        	   orderLine.Date = Base.ChkDate(GetValue(o, "OrderLineDate"));
        	   orderLine.Modified = Base.ChkDate(GetValue(o, "OrderLineModified"));
        	   orderLine.ProductNumber = GetValue(o, "OrderLineProductNumber");
        	   orderLine.ProductID = GetValue(o, "OrderLineProductID");
        	   orderLine.ProductVariantID = GetValue(o, "OrderLineProductVariantID");
        	   orderLine.ProductName = GetValue(o, "OrderLineProductName");
            orderLine.ProductVariantText = GetValue(o, "OrderLineProductVariantText");
            orderLine.Price.VATPercent = Base.ChkDouble(GetValue(o, "OrderLineVatPercent"));
            orderLine.Price.VAT = Base.ChkDouble(GetValue(o, "OrderLineVatPrice"));
            orderLine.Quantity = Base.ChkDouble(GetValue(o, "OrderLineQuantity"));
            orderLine.Type = GetValue(o, "OrderLineType");
            orderLine.Reference = GetValue(o, "OrderLineReference");
            orderLine.BOMItemID = GetValue(o, "OrderLineBOMItemID");
            orderLine.UnitID = GetValue(o, "OrderLineUnitID");
            orderLine.Price.PriceWithVAT = Base.ChkDouble(GetValue(o, "OrderLinePriceWithVAT"));
        	   orderLine.Price.PriceWithoutVAT = Base.ChkDouble(GetValue(o, "OrderLinePriceWithoutVAT"));
        	   orderLine.Price.VAT = Base.ChkDouble(GetValue(o, "OrderLinePriceVAT"));
        	   orderLine.Price.VATPercent = Base.ChkDouble(GetValue(o, "OrderLinePriceVATPercent"));
        	   orderLine.UnitPrice.PriceWithVAT = Base.ChkDouble(GetValue(o, "OrderLineUnitPriceWithVAT"));
        	   orderLine.UnitPrice.PriceWithoutVAT = Base.ChkDouble(GetValue(o, "OrderLineUnitPriceWithoutVAT"));
        	   orderLine.UnitPrice.VAT = Base.ChkDouble(GetValue(o, "OrderLineUnitPriceVAT"));
        	   orderLine.UnitPrice.VATPercent = Base.ChkDouble(GetValue(o, "OrderLineUnitPriceVATPercent"));
        	   orderLine.PageID = Base.ChkInteger(GetValue(o, "OrderLinePageId"));
        	   orderLine.Save();
        }
   }
}