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Printing RichTextBox content: (Find the idle printer)

  • Artigo

Recently, Praj blogged about printing content of a RichTextBox. Normally, if you use the documentPaginator or the visual, you might end up with some text clipped. Not a nice thing to happenJ. One thing that bugs me while printing is the print dialog. Often times, I just want to use a printer that’s not busy. Just don’t make me wait. It’s pretty simple to code and its worth it. No more waiting at the printer. ;)

 foreach (PrintQueue pq in GetPrintQueues("\\\\servername"))
            {                if (!pq.IsBusy)                {                   Print(pq);                   return;                }            }
         private IEnumerable<PrintQueue> 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);            }        }

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