private void SelectTables_SelectedIndexChanged(object sender, EventArgs e)
{
SelectedItemService service = new SelectedItemService(connectionString, providerName);
switch (SelectTables.SelectedItem)
{
case "Покупатели": TextObject.Clear(); service.GetSellers(TextObject); break;
case "Продавцы": TextObject.Clear(); service.GetCustomers(TextObject); break;
case "Продажи": TextObject.Clear(); service.GetSales(TextObject); break;
}
}
public new virtual void Clear()
{
if (FirstNode != null)
{
TextObject first = FirstNode;
while (first?.DLeft != null)
{
first = first.DLeft;
}
while (first != null)
{
TextObject next = first.DRight;
first.Destroy();
first.Clear();
first = next;
}
}
if (DrawPointer != null)
{
TextObject first = DrawPointer;
while (first?.DLeft != null)
{
first = first.DLeft;
}
while (first != null)
{
TextObject next = first.DRight;
first.Destroy();
first.Clear();
first = next;
}
}
FirstNode = this;
FirstNode.DLeft = null;
FirstNode.DRight = null;
DrawPointer = null;
}