private void HanldPDFFileEntry(FileEntry pFileEntry)
        {
            PDFParser pdfParser = new PDFParser(this);

            //pdfParser.ExtractText(file, Path.GetFileNameWithoutExtension(file) + ".txt");
            if (pdfParser.IsFileContainString(pFileEntry.FilePath, mTextToSearch))
            {
                PutFileEntryToSearchResult(pFileEntry);
            }
        }