ExampleForm::AddListItem PHP Méthode

    protected function AddListItem()
    {
        // First off, let's make sure that data was typed in
        if (!strlen(trim($this->txtItem->Text))) {
            $this->txtItem->Warning = 'Nothing was entered';
        } else {
            // Add the new item
            $this->lstListbox->AddItem(trim($this->txtItem->Text), trim($this->txtItem->Text));
        }
        // Clear the textbox
        $this->txtItem->Text = '';
        // Let's re-enable all the controls;
        $this->txtItem->Enabled = true;
        $this->lstListbox->Enabled = true;
        $this->btnAdd->Enabled = true;
    }