Added sample for KB how to Ensure Annotations and Form Fields Are Visible in Copied PDF Documents in PdfViewer?

Author: YathavakrishnanMohan

Create_NewPDF_From_Exsisting_document_pages/Data/Input.pdf

@@ -8,5 +8,6 @@
         Title="MainWindow" Height="450" Width="800">
     <Grid>
         <PdfViewer:PdfViewerControl Name="PDFViewer"/>
+        <Button Content="Button" HorizontalAlignment="Left" Margin="56,10,0,0" VerticalAlignment="Top" Click="Button_Click"/>
     </Grid>
 </Window>

Create_NewPDF_From_Exsisting_document_pages/MainWindow.xaml

@@ -24,13 +24,18 @@ public MainWindow()
         {
             InitializeComponent();
 
+            PDFViewer.Load(filePath + "Input.pdf");
+        }
+
+        private void Button_Click(object sender, RoutedEventArgs e)
+        {
             //Load a PDF document
-            PdfLoadedDocument ldoc = new PdfLoadedDocument(filePath  + "Input.pdf");
+            PdfLoadedDocument ldoc = new PdfLoadedDocument(filePath + "Input.pdf");
 
             ldoc.FlattenAnnotations();
 
-            if(ldoc.Form != null && ldoc.Form.Fields.Count > 0)
-                    ldoc.Form.FlattenFields();
+            if (ldoc.Form != null && ldoc.Form.Fields.Count > 0)
+                ldoc.Form.FlattenFields();
 
             //Create a new instance of PdfDocument class
             PdfDocument document = new PdfDocument();
@@ -56,7 +61,7 @@ public MainWindow()
                 g.DrawPdfTemplate(template, new PointF(0, 0), new SizeF(page.GetClientSize().Width, page.GetClientSize().Height));
 
             }
-            document.Save( filePath + "Output.pdf");
+            document.Save(filePath + "Output.pdf");
             PDFViewer.Load(filePath + "Output.pdf");
         }
     }