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Home ›› XDoc.PDF ›› C# PDF: Add Text Box

C#.NET PDF SDK - Add Text Box to PDF Page in C#.NET

C# Explanation to How to Add Text Box to PDF Page in C# Project with .NET PDF Library. ASP.NET Annotate PDF function is based on C# PDF Annotate SDK.

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Adding text box is another way to add text to PDF page. With RasterEdge XDoc.PDF annotation control, users can also perform this work on PDF page in their C# program.

Since RasterEdge XDoc.PDF SDK is based on .NET framework 2.0, users are enabled to use it in any type of a 32-bit or 64-bit .NET application, including ASP.NET web service and Windows Forms for any .NET Framework version from 2.0 to 4.5.

C# add text box annotation to pdf document

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.

String inputFilePath = Program.RootPath + "\\" + "2.pdf";
String outputFilePath = Program.RootPath + "\\" + "Annot_9.pdf";

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

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

annot.Boundary = new RectangleF(100F, 100F, 400F, 300F);

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

//  save to a new file

C# read text box annotation from pdf document

String inputFilePath = Program.RootPath + "\\" + "Annot_9.pdf";

PDFDocument doc = new PDFDocument(inputFilePath);
List<IPDFAnnot> annots = PDFAnnotHandler.GetAllAnnotations(doc);
foreach (IPDFAnnot annot in annots)
    if (annot is PDFAnnotTextBox)
        PDFAnnotTextBox obj = (PDFAnnotTextBox)annot;
        Console.WriteLine("Textbox Boundary: " + obj.Boundary.ToString());
        Console.WriteLine("Textbox Border Color: " + obj.LineColor.ToString());
        Console.WriteLine("Textbox Border Width: " + obj.LineWidth);
        Console.WriteLine("Textbox Fill Color: " + obj.FillColor.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);

.NET Class Namespace Required

Add necessary references:









Use corresponding namespaces;

  using RasterEdge.Imaging.Basic;

  using RasterEdge.XDoc.PDF;