create printbatch to print multiply flowdocuments

Question

How to print multiply flowdocumets in a batch? Following code should print different documents but print the same. This sample works pretty fine only if you print to the xps printer.

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

These are threading issues. After assigning the DataContext make sure that the thread processes its waiting queue:

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