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C# PDF Annotation Library
How to open, add, draw annotations to existing pdf file using c# .net


Excellent C# Solutions to Draw, Add and Edit Various Annotations on PDF File in C# Class Using .NET DLLs










  • A best and highly-rated PDF document processing SDK library for PDF annotating in ASP.NET web application and C#.NET WinForms
  • A powerful PDF annotator control enables C# developers to annotate PDF document in various annotation types in Visual Studio .NET
  • C# source code for adding or removing annotation from PDF file in .NET framework
  • Support to add flatten comments to PDF document online in ASPX webpage
  • Support .NET WinForms, ASP.NET MVC in IIS, ASP.NET Ajax, Azure cloud service, DNN (DotNetNuke), SharePoint
  • Support to take notes on adobe PDF file without adobe reader installed
  • Support to add text, text box, text field and crop marks to PDF document
  • Able to edit and change PDF annotation properties such as font size or color
  • Abilities to draw markups on PDF document or stamp on PDF file
  • Users are able to delete annotation from PDF document in C#.NET class


The combination of RasterEdge's PDF document processing control and its annotating library enables C# developers and end-users to integrate robust PDF document annotation capabilities to any type of a 32-bit or 64-bit .NET application for .NET Framework 2.0 and above.



Perform Various annotations on PDF Page using C#.NET Demo Codes


C#.NET: Add Sticky Note on PDF Page


Tell users how to add sticky note annotations on PDF document, detailed references and demo code are given for quick integration in C#.NET application.

C#.NET: Highlight Text on PDF File


Provide C# class demo code to help users highlight selected text on PDF page in Visual C# .NET application.

C#.NET: Add Text to PDF Document


This page will guide C# users how to add text comments on PDF page using C# demo code in Visual Stuodio .NET class.

C#.NET: Add Text Box to PDF Document


Provide users with examples for adding text box to PDF and edit font size and color in text box field in C#.NET program.

C#.NET: Draw Markups on PDF File


Enable users to draw various annotation markups on PDF page. C# class demo code and .NET dll files are give to achieve these features.





C# Project Libraries: PDF Annotation in C#.NET



In order to run the sample code, the following steps would be necessary.


Add necessary references:


  RasterEdge.Imaging.Basic.dll


  RasterEdge.Imaging.Basic.Codec.dll


  RasterEdge.Imaging.Drawing.dll


  RasterEdge.Imaging.Font.dll


  RasterEdge.Imaging.Processing.dll


  RasterEdge.XImage.Raster.dll


  RasterEdge.XImage.Raster.Core.dll


  RasterEdge.XDoc.PDF.dll


Use corresponding namespaces;


  using RasterEdge.Imaging.Basic;


  using RasterEdge.XDoc.PDF;


Note: When you get the error "Could not load file or assembly 'RasterEdge.Imaging.Basic' or any other assembly or one of its dependencies. An attempt to load a program with an incorrect format", please check your configure as follows:

       

       If you are using x64 libraries/dlls, Right click the project -> Properties -> Build -> Platform target: x64.

       

       If using x86, the platform target should be x86.




C#.NET Demo Code: Retrieve All Annotations Information from PDF Document



Learn how to retrieve all annotations from PDF file in C# project.




// Get PDF document.
String fileInpath = @"";
PDFDocument doc = new PDFDocument(fileInpath);

// Get all annotations.
List<IPDFAnnot> allAnnotation = PDFAnnotHandler.GetAllAnnotations(doc);




C#.NET Demo Code: Retrieve All Annotations Information from PDF Page



Learn how to retrieve all annotations from PDF page in C# project.




// Get PDF document.
String fileInpath = @"";
PDFDocument doc = new PDFDocument(fileInpath);

// Get PDF page.
PDFPage page = (PDFPage)doc.GetPage(0);

// Get all annotations of PDF page.
List<IPDFAnnot> allAnnotation = PDFAnnotHandler.GetAllAnnotations(page);




C#.NET Demo Code: Add an Annotation to a PDF Page



Use the C# code below to add an annotation to a PDF page in C# project.




String inputFilePath = Program.RootPath + "\\" + "2.pdf";
String outputFilePath = Program.RootPath + "\\" + "Annot_6.pdf";

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

{
    //  create the annotation
    PDFAnnotLine annot = new PDFAnnotLine();

    annot.Start = new PointF(100F, 100F);
    annot.End = new PointF(200F, 200F);

    //  add annotation to the page
    PDFAnnotHandler.AddAnnotation(page, annot);
}
{
    //  create the annotation
    PDFAnnotArrow annot = new PDFAnnotArrow();

    annot.Start = new PointF(300F, 100F);
    annot.End = new PointF(400F, 150F);

    //  add annotation to the page
    PDFAnnotHandler.AddAnnotation(page, annot);
}
{
    //  create the annotation
    PDFAnnotEllipse annot = new PDFAnnotEllipse();

    annot.Location = new PointF(300, 300);
    annot.Width = 50F;
    annot.Height = 50F;

    //  add annotation to the page
    PDFAnnotHandler.AddAnnotation(page, annot);
}
{
    //  create the annotation
    PDFAnnotRectangle annot = new PDFAnnotRectangle();

    annot.Location = new PointF(400, 400);
    annot.Width = 50F;
    annot.Height = 50F;

    //  add annotation to the page
    PDFAnnotHandler.AddAnnotation(page, annot);
}
{
    //  create the annotation
    PDFAnnotPolygon annot = new PDFAnnotPolygon();

    annot.Points = new PointF[5] {
        new PointF(50F, 450F),
        new PointF(100F, 450F),
        new PointF(120F, 480F),
        new PointF(100F, 500F),
        new PointF(50F, 500F)
    };

    //  add annotation to the page
    PDFAnnotHandler.AddAnnotation(page, annot);
}
{
    //  create the annotation
    PDFAnnotPolyline annot = new PDFAnnotPolyline();

    annot.Points = new PointF[] {
        new PointF(250F, 450F),
        new PointF(300F, 450F),
        new PointF(320F, 480F),
        new PointF(300F, 500F),
        new PointF(250F, 500F)
    };

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

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