private void button1_Click(object sender, EventArgs e) { OrderService searchOrderService = new OrderService(); List <Order> lo; if (OrderID_radioButton.Checked) { lo = orderService.SearchOrderByOrderID(Search_textBox.Text); } else if (ClientName_radioButton.Checked) { lo = orderService.SearchOrderByClientName(Search_textBox.Text); } else if (OrderPrices_radioButton.Checked) { lo = orderService.SearchOrderByTotalPrice(Convert.ToDouble(Search_textBox.Text)); } else if (GoodsName_radioButton.Checked) { lo = orderService.SearchOrderByGoodsName(Search_textBox.Text); } else { lo = orderService.SearchAllOrder(); } foreach (Order o in lo) { searchOrderService.AddOrder(o); } Search_textBox.Text = ""; groupBox1.Visible = false; orderService_bindingSource.DataSource = searchOrderService; orderService_bindingSource.ResetBindings(true); }