Generate pdf from rich text column in sharepoint 2013 c#

I have a rich text column in my sharepoint 2013 list. I want to export the contents of that column as pdf and save it to local file system. I tried to do it by using Spire.Doc and iTextSharp but didn't work.

private static void DownloadFiles(SPListItem item)
{
    try
    {
        string _strPDF = Convert.ToString(item["More Details"]);
        string _strPDFTitle = Convert.ToString(item["Project"]);

        FileStream fs = new FileStream(@"C:\Users\Administrator\" + _strPDFTitle + ".pdf", FileMode.Create, FileAccess.Write, FileShare.None);

        Document doc = new Document();
        PdfWriter oPdfwriter = PdfWriter.GetInstance(doc, fs);
        doc.Open();
        doc.Add(new Paragraph(_strPDF));
        doc.Close();
    }
    catch (Exception ex)
    {
        //throw ex;
        Console.WriteLine("DownloadFiles method error: {0}", ex.Message);
    }
}

Is there any way to achieve this?

You can take the string you have received in _strPDFTitle and programmatically convert it to PDF using the Document Editor. Here is documentation which will help with this:

import { EditorInitializer } from '../utility/EditorInitializer';
export class TextEnginesExample {
run = () => {
new EditorInitializer();
this.initText();
}
initText = () => {
//Add existing String
editor.engine.text.insertText("This is your input string");
}
exportAsPdf = () => {
//exports the current document for saving
var promise = editor.document.toFile("untitled", lt.Document.Writer.DocumentFormat.pdf);
var err = null;
promise.then(function (name: string) { });
promise.catch(function (err: string) {
alert("There was an issue exporting the document. " + err);
});

https://www.leadtools.com/help/sdk/v22/dh/javascript/de/contextmodule.html

https://www.leadtools.com/help/sdk/v22/dh/javascript/de/textengine.html