private void btnPrinterDetail_Click(object sender, RoutedEventArgs e)
 {
     try
     {
         basicSituation    = new TextBasicSituation();
         skipPages.Content = basicSituation;
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message, this.Title, MessageBoxButton.OK);
     }
 }
        //点击按钮找到打印机列表的SN码
        private void printerMessage_Click_1(object sender, RoutedEventArgs e)
        {
            printer = new Printer();
            //isVisibilityForEnter.Visibility = Visibility.Visible;
            btnPrinterDetail.IsChecked = true;

            List <Button> buttonItems = printer.GetChildObjects <Button>(itemsPrinters, "");
            TextBlock     txt         = null;

            foreach (Button button in buttonItems)
            {
                if (button.IsFocused)
                {
                    txt = printer.FindFirstVisualChild <TextBlock>(button, "txtPrintersSN");
                    txtPrinterSN.Text = txt.Text;
                    break;
                }
            }
            basicSituation    = new TextBasicSituation(txt.Text);
            skipPages.Content = basicSituation;
        }