private void button2_Click(object sender, EventArgs e) { if (ordersBindingSource.Current != null) { OrderService.DeletOrder((Order)ordersBindingSource.Current); MessageBox.Show("删除成功", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Information); Update(); } else { MessageBox.Show("删除失败", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Information); } }