System.Printing命名空间设置打印机页源

Question

我正在尝试通过System.Printing命名空间打印XPS流

    Stream stm = pdftron.PDF.Convert.ToXps(pdfdoc);

    LocalPrintServer localPrintServer = new LocalPrintServer();
    PrintQueueCollection pqc = localPrintServer.GetPrintQueues();
    PrintQueue defaultPrintQueue = localPrintServer.GetPrintQueue(_PrinterName);
    MemoryStream ms = defaultPrintQueue.GetPrintCapabilitiesAsXml();


    // Call AddJob
    System.Printing.PrintTicket printTicket = defaultPrintQueue.DefaultPrintTicket;


    PrintSystemJobInfo myPrintJob = defaultPrintQueue.AddJob();

    Stream myStream = myPrintJob.JobStream;//may be this line is wrong, can you suggest alternative?
    myStream = stm;//may be this line is wrong, can you suggest alternative?
    myStream.Close();//may be this line is wrong, can you suggest alternative?
    var inp= defaultPrintQueue.GetPrintCapabilities().InputBinCapability;
    System.Printing.PrintTicket newprintTicket = XpsPrinterUtils.ModifyPrintTicket(printTicket, "psk:JobInputBin", "NS0000:" + _PaperSource);
    System.Printing.ValidationResult vr = defaultPrintQueue.MergeAndValidatePrintTicket(printTicket, newprintTicket);// this line giving exception while changing page source merge and validate
    myPrintJob.Commit();

XpsPrinterUtils.ModifyPrintTicket from github

代码不工作，我被困在这一点上。

任何人对此都有很好的想法或解决方案:使用system.printing名称空间打印(由pdftron获得的Xps文件流)并动态更改页面源代码。

Answer 1

我没有测试，但这似乎更接近正确的解决方案。

Stream stream_source = pdftron.PDF.Convert.ToXps(pdfdoc);
Stream stream_sink = myPrintJob.JobStream;
stream_source.CopyTo(stream_sink);

您可能希望通过将stream_sink创建为指向磁盘上文件的流，并验证stream_source.CopyTo(stream_sink)是否按预期工作来测试以上内容。如果是这样，那么任何剩余的问题都将与使用System.Printing应用程序接口有关，而不是与PDFNet有关。