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C# PDF Annotation Viewer Library
How to open, add, delete, update PDF file text note using .net pdf viewer control in web browser, WinForms. Free Download


C#.NET Tutorial for How to Add a Sticky Note Annotation to PDF Page with Visual C# Language in .NET Project. ASP.NET Annotate PDF function is based on C# PDF Annotate SDK.







ON THIS PAGE:



  • A best application for annotation PDF document in Visual C#.NET application and ASP.NET WebForm project
  • Support .NET WinForms, ASP.NET MVC in IIS, ASP.NET Ajax, Azure cloud service, DNN (DotNetNuke), SharePoint
  • Evaluation library and components enable users to annotate PDF without adobe PDF reader control installed
  • Able to add notes to PDF using C# source code in Visual Studio .NET framework
  • Allow users to add comments online in ASPX webpage
  • Able to change font size in PDF comment box
  • Able to save and print sticky notes in PDF file




C# add sticky note annotation to pdf document


The C# code and text below will show how to add sticky note annotation to PDF in C# code

  • Create a PDFDocument object with an existing PDF file loaded
  • Get a PDFPage object from the first page of the PDF file
  • Create a new PDFAnnotStickyNote object with page position set
  • Utilize method PDFAnnotHandler.AddAnnotation() to add new sticky note annotation to the PDF page
  • Save the PDF document to a new file



String inputFilePath = Program.RootPath + "\\" + "2.pdf";
String outputFilePath = Program.RootPath + "\\" + "Annot_8.pdf";

//  open a PDF file
PDFDocument doc = new PDFDocument(inputFilePath);
//  get the 1st page
PDFPage page = (PDFPage)doc.GetPage(0);

//  create the annotation
PDFAnnotStickyNote annot = new PDFAnnotStickyNote();

annot.Position = new PointF(100F, 100F);

//  add annotation to the page
PDFAnnotHandler.AddAnnotation(page, annot);

//  save to a new file
doc.Save(outputFilePath);




C# read sticky note annotation from pdf document


String inputFilePath = Program.RootPath + "\\" + "Annot_8.pdf";

PDFDocument doc = new PDFDocument(inputFilePath);
List<IPDFAnnot> annots = PDFAnnotHandler.GetAllAnnotations(doc);
foreach (IPDFAnnot annot in annots)
{
    if (annot is PDFAnnotStickyNote)
    {
        PDFAnnotStickyNote obj = (PDFAnnotStickyNote)annot;
        Console.WriteLine("Color: " + obj.Color.ToString());
    }
}




C# delete all annotations from pdf document


String inputFilePath = Program.RootPath + "\\" + "1_Annots.pdf";

PDFDocument doc = new PDFDocument(inputFilePath);
//  get all annotations in the 1st page
PDFPage page = (PDFPage)doc.GetPage(0);
List<IPDFAnnot> annots = PDFAnnotHandler.GetAllAnnotations(page);
//  remove all annotations in the 1st page
PDFAnnotHandler.DeleteAnnotation(doc, annots);




C# retrieve annotation popup note window's properties


String inputFilePath = Program.RootPath + "\\" + "Annot_1.pdf";

PDFDocument doc = new PDFDocument(inputFilePath);
List<IPDFAnnot> annots = PDFAnnotHandler.GetAllAnnotations(doc);
foreach (IPDFAnnot annot in annots)
{
    if (annot is IPDFPopupAnnot)
    {
        Console.WriteLine("Annotation has popup window");

        IPDFPopupAnnot obj = (IPDFPopupAnnot)annot;
        Console.WriteLine("Is open in the begin:  " + obj.Popup.IsOpen);
        Console.WriteLine("Popup window boundary: " + obj.Popup.Boundary.ToString());
    }
    else
    {
        Console.WriteLine("Annotation has no popup window");
    }
}




C# retrieve annotation flags


String inputFilePath = Program.RootPath + "\\" + "Annot_1.pdf";

PDFDocument doc = new PDFDocument(inputFilePath);
List<IPDFAnnot> annots = PDFAnnotHandler.GetAllAnnotations(doc);
foreach (IPDFAnnot annot in annots)
{
    Console.WriteLine("Annotation Flags");
    Console.WriteLine("  Invisible:       " + annot.IsInvisible);
    Console.WriteLine("  Hidden:          " + annot.IsHidden);
    Console.WriteLine("  Print:           " + annot.IsPrint);
    Console.WriteLine("  No Zoom:         " + annot.NoZoom);
    Console.WriteLine("  No Rotate:       " + annot.NoRotate);
    Console.WriteLine("  No View:         " + annot.NoView);
    Console.WriteLine("  Read Only:       " + annot.IsReadOnly);
    Console.WriteLine("  Locked:          " + annot.IsLocked);
    Console.WriteLine("  Toggle No View:  " + annot.IsToggleNoView);
    Console.WriteLine("  Locked Contents: " + annot.IsLockedContents);
}




C# set annotation flags


String inputFilePath = Program.RootPath + "\\" + "2.pdf";
String outputFilePath = Program.RootPath + "\\" + "Annot_1.pdf";

//  create the annotation
PDFAnnotDeleteLine annot = new PDFAnnotDeleteLine();
annot.StartPoint = new PointF(100F, 200F);
annot.EndPoint = new PointF(300F, 400F);

//  set annotation flags
annot.IsInvisible = false;
annot.IsPrint = true;
annot.NoRotate = true;
annot.NoZoom = true;

//  add annotation
PDFAnnotHandler.AddAnnotation(inputFilePath, 1, annot, outputFilePath);