//when a Delivery is committed, the dishes in the delivery is commiteed to db at one time
public void CommitDelivery(Delivery pD)
{
DataContextDataContext dc = new DataContextDataContext();
dc.insert_delivery(
(Guid?)pD.id,
pD.userFrom,
pD.customerName,
pD.phone,
pD.address,
(DateTime?)pD.commitTime,
(DateTime?)pD.deliveryTime
);
foreach (DishQuota dq in pD.dishQuotaList)
{
dc.insert_delivery_dish((Guid?)dq.id, pD.id, dq.dishName, (int?)dq.quota, dq.note);
}
}