public void addProduct(Product p) //向订单中添加产品详情
{
ProductDetail detail_current = new ProductDetail(p.Price, p.Description);
detail_list.Add(detail_current);
TotalAmount += float.Parse(p.Price);
OrderID.Append(p.PID).Append(DateTime.Now.Hour).Append(DateTime.Now.Minute).Append(DateTime.Now.Second); //生成订单id
}
