convert a pdf into html in csharp

To convert a PDF file into an HTML file in C#, you can use a third-party library such as iTextSharp. Here is an example of how to accomplish this using iTextSharp:

main.cs
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.tool.xml;

class Program
{
    static void Main(string[] args)
    {
        // Load the PDF file
        var pdfReader = new PdfReader("example.pdf");

        // Create a string writer to hold the HTML output
        var stringWriter = new StringWriter();

        // Set up the HTML conversion options
        var htmlContext = new HtmlPipelineContext(null);
        htmlContext.SetTagFactory(Tags.GetHtmlTagProcessorFactory());

        // Create a PDF-to-HTML converter
        var pdfToHtml = new PdfToHtmlConverter();

        // Set the output writer and conversion options
        pdfToHtml.SetOpenFile(false);
        pdfToHtml.SetHtmlStyleClass("pdf2html");
        pdfToHtml.SetDestinationEncoding("UTF-8");
        pdfToHtml.SetContext(htmlContext);
        pdfToHtml.SetHtmlWriter(new XMLWorkerHelper().GetDefaultCssResolver(true), stringWriter);

        // Convert the PDF to HTML
        pdfToHtml.ConvertPdf(pdfReader);

        // Display the HTML output
        Console.WriteLine(stringWriter.ToString());
    }
}
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You'll need to replace "example.pdf" with the filepath to your own PDF file. This code reads in the PDF file, converts it into HTML using iTextSharp, and outputs the resulting HTML to the console.

Keep in mind that conversion from PDF to HTML may not always produce perfect results, as the structure and formatting of the two formats can be quite different.

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