OnPrint.txt

 FlowDocument fd = new FlowDocument { FontSize = 12, FontFamily = new System.Windows.Media.FontFamily("Franklin Gothic") };
            fd.Blocks.Add(new Paragraph(new Run("Treatment Plan Report")));
            fd.Blocks.Add(new BlockUIContainer(new PatientView { DataContext = PatientViewModel.PatientInfo }));
            fd.Blocks.Add(new BlockUIContainer(new PlanView { DataContext = PlanViewModel.PlanInfo }));
            foreach(var field in FieldViewModel.Fields)
            {
                fd.Blocks.Add(new BlockUIContainer(new FieldDetailsView { DataContext = field }));
            }
            BitmapSource bmp = new PngExporter().ExportToBitmap(DVHViewModel.DVHPlotModel);
            fd.Blocks.Add(new BlockUIContainer(new System.Windows.Controls.Image
            {
                Source = bmp,
                Height = 600,
                Width = 725
            }));
            System.Windows.Controls.PrintDialog printer = new System.Windows.Controls.PrintDialog();
            //printer.PrintTicket.PageOrientation = System.Printing.PageOrientation.Landscape;
            fd.PageHeight = 1056;
            fd.PageWidth = 816;
            fd.PagePadding = new System.Windows.Thickness(50);
            fd.ColumnGap = 0;
            fd.ColumnWidth = 816;
            IDocumentPaginatorSource source = fd;
            if(printer.ShowDialog() == true)
            {
                printer.PrintDocument(source.DocumentPaginator, "TreatmentPlanReport");
            }