How to Search Comment from PDF in C#? RRS feed

  • Question

  • I am able to read the comments in PDF. Now i have to search that Comment.

    How can i do that?

    Wednesday, December 5, 2018 7:33 AM

All replies

  • .NET does not support reading/writing PDFs. To do that you have to use a third party library like iTextSharp. Questions related to third party libraries should be posted in their forums. This forum is only for C#-specific questions.

    Michael Taylor http://www.michaeltaylorp3.net

    Wednesday, December 5, 2018 3:11 PM
  • You'll need a PDF library to work with PDF files. I think you might be interested in this: https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Annotation/Modify-and-Format-Annotation-in-PDF-in-C-VB.NET.html
    Thursday, December 6, 2018 2:38 AM
  • Hi krunnu,

    Thank you for posting here.

    For your question, if you want to search that Comment in c#, please refer to this code below.

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using Atalasoft.Pdf;
    using Spire.Pdf;
    using Spire.PdfViewer;
    using iTextSharp.text.pdf;
    using iTextSharp.text.pdf.parser;
    using System.IO;
    using iTextSharp.text;
    using Spire.Pdf.General.Find;
    using org.apache.pdfbox.pdmodel;
    using org.apache.pdfbox.util;
    namespace test1
        class Program
            static void Main(string[] args)
                Spire.Pdf.PdfDocument pdf = new Spire.Pdf.PdfDocument();
                pdf.LoadFromFile(@"C: \xxx.pdf");
                PdfTextFind[] AllMatchedText = null;
                foreach (PdfPageBase page in pdf.Pages)
                    AllMatchedText = page.FindText("Hello").Finds;
                    foreach (var item in AllMatchedText)



    Best regards,

    Jack J Jun.

    MSDN Community Support
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    Friday, December 7, 2018 9:05 AM