//adds orderline to database
public void addOrderline(Customer custIn)
{
for (int i = 0; i < custIn.Orders[0].OrderLines.Count; i++)
{
shopDC.InsertOrderLine(custIn.Orders[0].OrderLines[i].ProdID, custIn.Orders[0].OrderLines[i].OrderID, custIn.Orders[0].OrderLines[i].Quantity);
}
}