ObjectNumber Property

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Controls; 
using Leadtools.Drawing; 
using Leadtools.ImageProcessing; 
using Leadtools.Pdf; 
using Leadtools.Svg; 
using Leadtools.WinForms; 
 
public void AnnotationsReplyParentChildTest() 
{ 
   string sourceFile = Path.Combine(LEAD_VARS.ImagesDir, "Leadtools.pdf"); 
   string targetFile = Path.Combine(LEAD_VARS.ImagesDir, "Leadtools_with_rectangle_reply.pdf"); 
 
   // Copy the source to target 
   if (File.Exists(targetFile)) 
   { 
      File.SetAttributes(targetFile, File.GetAttributes(targetFile) & ~FileAttributes.ReadOnly); 
      File.Delete(targetFile); 
   } 
 
   File.Copy(sourceFile, targetFile, true); 
   File.SetAttributes(targetFile, File.GetAttributes(targetFile) & ~FileAttributes.ReadOnly); 
 
   var annotations = new List<PDFAnnotation>(); 
 
   // Add a rectangle and a reply to it 
   const string myRectangle = "myRectangle"; 
   const string myReply = "myReply"; 
 
   // Create dashed red pen with width of 2 
   var pen = new PDFPen(); 
   pen.Color = RasterColor.FromKnownColor(RasterKnownColor.Red); 
   pen.PenStyle = PDFPen.Dashed; 
   pen.Width = 2; 
 
   // Create red solid brush 
   var brush = new PDFBrush(); 
   brush.BrushStyle = PDFBrush.Solid; 
   brush.Color = RasterColor.FromKnownColor(RasterKnownColor.Red); 
 
   var rectObj = new PDFRectangleAnnotation(); 
   rectObj.PageNumber = 1; 
   rectObj.Pen = pen; 
   rectObj.Brush = brush; 
   var rect = new PDFRect(72, 72, 144, 108); 
   rectObj.Bounds = rect; 
   rectObj.Transparency = 1; 
   // Set the object number to a unique value, here we call it parent1. Note that this is 
   // will be used when storing the objects inside the PDF and the object id (or number) 
   // will be replaced by a unique value during the save process. 
   rectObj.ObjectNumber = myRectangle; 
   annotations.Add(rectObj); 
 
   // Add an opened note that is a child of the rectangle 
   var noteObj1 = new PDFNoteAnnotation(); 
   noteObj1.PageNumber = 1; 
   noteObj1.Content = "Reply to rect"; 
   noteObj1.Point = new PDFPoint(72, 72); 
   noteObj1.Color = RasterColor.FromKnownColor(RasterKnownColor.Yellow); 
   noteObj1.Open = false; 
   // We must give it a unique name, again will be replaced by the framework. 
   noteObj1.ObjectNumber = myReply; 
   // And set the object we are replying to, in this case, the rectangle 
   noteObj1.ParentObjectNumber = rectObj.ObjectNumber; 
   annotations.Add(noteObj1); 
 
   // Add an ellipse, with no note 
   var ellipseObj = new PDFEllipseAnnotation(); 
   ellipseObj.PageNumber = 1; 
   ellipseObj.Pen = pen; 
   ellipseObj.Brush = brush; 
   rect = new PDFRect(216, 72, 288, 108); 
   ellipseObj.Center = new PDFPoint(rect.Left + rect.Right / 2, rect.Top + rect.Bottom / 2); 
   ellipseObj.HorizontalRadius = rect.Right - rect.Left; 
   ellipseObj.VerticalRadius = rect.Bottom - rect.Top; 
   ellipseObj.Transparency = 1; 
   // Note that since we will not add a reply to this annotation object, we do not 
   // have to set the value of ObjectNumber to anything and leave it as the default 
   // of null. The framework will replace it with a unique value during the save 
   // process. 
   //ellipseObj.ObjectNumber = null; 
   annotations.Add(ellipseObj); 
 
   // Add an opened note that is a not a child of any objects. 
   var noteObj2 = new PDFNoteAnnotation(); 
   noteObj2.PageNumber = 1; 
   noteObj2.Content = "No parent"; 
   noteObj2.Point = new PDFPoint(216, 72); 
   noteObj2.Color = RasterColor.FromKnownColor(RasterKnownColor.Yellow); 
   noteObj2.Open = true; 
   // Again, since we do not need to associate this object with any other there is no 
   // need to set its nor its parent ID 
   //noteObj2.ObjectNumber = null; 
   //noteObj2.ParentObjectNumber = null; 
   annotations.Add(noteObj2); 
 
   // Save the PDF file 
 
   var pdfFile = new PDFFile(targetFile); 
   pdfFile.WriteAnnotations(annotations, null); 
 
   Console.WriteLine("PDF file with annotations created in\n{0}", targetFile); 
 
   // Open the created PDF in Adobe Acrobat and it should contain the following: 
   // - Dashed red rectangle object. 
   // - Closed reply to the rectangle with "Reply to rect" content. This should show as a note in the rectangle object. 
   // - Dashed red ellipse object. 
   // - Open yellow stand-alone note object with "No parent" content. 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}