如何以编程方式在c#中搜索PDF文档

using System;
using System.IO;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;

class Program
{
    static void Main(string[] args)
    {
        string pdfFilePath = "path/to/your/pdf/file.pdf";
        string searchText = "text to search";

        using (PdfReader pdfReader = new PdfReader(pdfFilePath))
        {
            for (int pageNumber = 1; pageNumber <= pdfReader.NumberOfPages; pageNumber++)
            {
                ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
                string currentPageText = PdfTextExtractor.GetTextFromPage(pdfReader, pageNumber, strategy);

                if (currentPageText.Contains(searchText))
                {
                    Console.WriteLine($"Text found on page {pageNumber}.");
                }
            }
        }
    }
}