错误找不到PDF标头签名

将文件从MSword转换为PDF抽取后，出现错误未找到PDF标头签名。错误找不到PDF标头签名

public void Extract_inputpdf() 
{ 
    text_input_File = string.Empty; 

    StringBuilder sb_inputpdf = new StringBuilder(); 
    PdfReader reader_inputPdf = new PdfReader(path); //read PDF 
    for (int i = 0; i <=reader_inputPdf.NumberOfPages ; i++) 
    { 
     TextWithFont_inputPdf inputpdf = new TextWithFont_inputPdf(); 

     text_input_File = iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(reader_inputPdf, i, inputpdf); 

     sb_inputpdf.Append(text_input_File); 

     input_pdf = sb_inputpdf.ToString(); 
    } 

    reader_inputPdf.Close(); 
    clear(); 
}

谁能告诉我怎么解决this.Thanku

// word to pdf 
if (Extentsion_path == ".doc" || Extentsion_path == ".docx") 
{ 
    uploadFInput.SaveAs(targetPathip); 
    string wordFileName = targetPathip; 
    _Word.Visible = false; 
    _Word.ScreenUpdating = false; 

    // Cast as Object for word Open method 
    filename = (object)wordFileName; 

    // Use the dummy value as a placeholder for optional arguments 

    Microsoft.Office.Interop.Word.Document doc = _Word.Documents.Open(ref filename, ref _MissingValue, 
     ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue, 
     ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue, 
     ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue); 
    doc.Activate(); 

    object outputFileName = pdfFileName = Path.ChangeExtension(wordFileName, "pdf"); 
    object fileFormat = WdSaveFormat.wdFormatPDF; 

    // Save document into PDF Format 
    doc.SaveAs(ref outputFileName, ref fileFormat, ref _MissingValue, ref _MissingValue, 
     ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue, 
     ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue, 
     ref _MissingValue, ref _MissingValue, ref _MissingValue, ref _MissingValue); 

    // Close the Word document, but leave the Word application open. 
    // doc has to be cast to type _Document so that it will find the 
    // correct Close method. 
    object saveChanges = WdSaveOptions.wdDoNotSaveChanges; 
    ((_Document)doc).Close(ref saveChanges, ref _MissingValue, ref _MissingValue); 
    doc = null; 

    // word has to be cast to type _Application so that it will find 
    // the correct Quit method. 
    ((_Application)_Word).Quit(ref _MissingValue, ref _MissingValue, ref _MissingValue); 

    _Word = null; 

    //uploadFInput.SaveAs(pdfFileName); 
    // = targetPathip; 
    uploadFInput.SaveAs(pdfFileName); 
    LblFleip.Text = pdfFileName; 
} 
else 
{ 
    uploadFInput.SaveAs(targetPathip); 
    LblFleip.Text = targetPathip; 
}

来源

2013-06-18 pdp

那么您是从Microsoft Word保存/导出为PDF还是现在您正在尝试阅读PDF？哪条线给你错误？我可以发现的一件事是，iText中的页码以'1'开始，而不是'0'，因此请尝试将'for'循环从'1'开始。 –

我给PDf加了词。读取时出错PdfReader reader_inputPdf = new PdfReader（path）; //阅读PDF – pdp

用于测试目的我正在测试相同的PDF很多次我得到类型不匹配的错误。（来自HRESULT的异常：0x80020005（DISP_E_TYPEMISMATCH）） – pdp

您可以在记事本中打开PDF文件，并首先检查签名的存在。

来源

2013-06-18 17:05:26

错误找不到PDF标头签名

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