最近, 发表了关于打印RichTextBox内容的博文。一般，如果你使用documentPaginator或者visual，你可能因一些文本剪贴而终止。这可不是好事。当打印时容易出的bug是打印对话框。通常，我想使用空闲的打印机，而不是让我等待。下面是我针对此修改的代码。

 

foreach (PrintQueue pq in GetPrintQueues("\\\\servername"))             {
   if (!pq.IsBusy)                 {
                      Print(pq); return;                 }             } private IEnumerable
     
       GetPrintQueues(string servername)         {
               PrintServer ps; if (string.IsNullOrEmpty(servername))             {
   // local printer name                 ps = new LocalPrintServer();             } else             {
   // network printer share                 ps = new PrintServer(servername);             } return ps.GetPrintQueues();        } void Print(PrintQueue pq)         {
               TextRange sourceDocument = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);             MemoryStream stream = new MemoryStream();             sourceDocument.Save(stream, DataFormats.Xaml); // Clone the source document's content into a new FlowDocument.             FlowDocument flowDocumentCopy = new FlowDocument();             TextRange copyDocumentRange = new TextRange(flowDocumentCopy.ContentStart, flowDocumentCopy.ContentEnd);             copyDocumentRange.Load(stream, DataFormats.Xaml); // Create a XpsDocumentWriter object, open a Windows common print dialog. // This methods returns a ref parameter that represents information about the dimensions of the printer media.             XpsDocumentWriter docWriter = PrintQueue.CreateXpsDocumentWriter(pq);             PageImageableArea ia = pq.GetPrintCapabilities().PageImageableArea;             PrintTicket pt = pq.UserPrintTicket; if (docWriter != null && ia != null)             {
                   DocumentPaginator paginator = ((IDocumentPaginatorSource)flowDocumentCopy).DocumentPaginator; // Change the PageSize and PagePadding for the document to match the CanvasSize for the printer device.                 paginator.PageSize = new Size((double)pt.PageMediaSize.Width, (double)pt.PageMediaSize.Height);                 Thickness pagePadding = flowDocumentCopy.PagePadding;                 flowDocumentCopy.PagePadding = new Thickness(                         Math.Max(ia.OriginWidth, pagePadding.Left),                         Math.Max(ia.OriginHeight, pagePadding.Top),                         Math.Max((double)pt.PageMediaSize.Width - (double)(ia.OriginWidth + ia.ExtentWidth), pagePadding.Right),                         Math.Max((double)pt.PageMediaSize.Height - (double)(ia.OriginHeight + ia.ExtentHeight), pagePadding.Bottom));                 flowDocumentCopy.ColumnWidth = double.PositiveInfinity; // Send DocumentPaginator to the printer.                 docWriter.Write(paginator);             }         }