public Admin_AddWarehouse()
 {
     InitializeComponent();
     instance = this;
 }
 // -- Expanded func for Orders - END
 public void admin_warehouse_add_btn_Click_1(object sender, RoutedEventArgs e)
 {
     Admin_AddWarehouse add_warehouse_form = new Admin_AddWarehouse();
     add_warehouse_form.Show();
     Admin_AddWarehouse.instance.warehouse_ID_get(ExecutScalarQuery("SELECT MAX(warehouse.warehouse_id) FROM sbs.warehouse"));
 }