private void QueryOrder() { switch (comboBox1.SelectedIndex) { case 0: orderBindingSource.DataSource = orderService.QueryById(textBox1.Text); break; case 1: orderBindingSource.DataSource = orderService.QueryByCustomer(textBox1.Text); break; case 2: orderBindingSource.DataSource = orderService.QueryByGoods(textBox1.Text); break; default: orderBindingSource.DataSource = orderService.GetAllOrders(); break; } orderBindingSource.ResetBindings(false); detailBindingSource.ResetBindings(false); }