public void Delete(String orderId) { using (var db = new OrderDB()) { var order = db.Order.Include("Details").SingleOrDefault(o => o.Id == orderId); db.OrderDetail.RemoveRange(order.Details); db.Order.Remove(order); db.SaveChanges(); } }
public void Add(Order order) { using (var db = new OrderDB()) { db.Order.Add(order); //db.Order.Attach(order); //db.Entry(order).State = EntityState.Added; db.SaveChanges(); } }
public void Update(Order order)//修改 { using (var db = new OrderDB()) { db.Order.Attach(order); db.Entry(order).State = EntityState.Modified; order.Details.ForEach( item => db.Entry(item).State = EntityState.Modified); db.SaveChanges(); } }