创建打印批处理以打印多个流文档

Question

如何批量打印多个flowdocument？ 以下代码应打印不同的文档但打印相同。只有在打印到xps打印机时，此示例才能正常工作。

var printDialog = new PrintDialog();
if(printDialog.ShowDialog() == true) {      
  var xpsDocumentWriter = PrintQueue.CreateXpsDocumentWriter(printDialog.PrintQueue);

  foreach(var person in persons) {
    var doc = Application.LoadComponent(new Uri("Template.xaml", UriKind.Relative)) as FlowDocument;
      doc.DataContext = persons;
      var paginator = ((IDocumentPaginatorSource)doc).DocumentPaginator;          
      xpsDocumentWriter.Write(paginator);
    }
  }

Answer 1

这些是线程问题。分配DataContext后，确保线程处理其等待队列：

Dispatcher.CurrentDispatcher.Invoke(
        DispatcherPriority.SystemIdle, new DispatcherOperationCallback(_ => null), null);