将pdf页面转换为图像iTextSharp c＃

Question

  

可能重复：
  Can iTextSharp rasterize/export to JPEG or other image format?

您好，

我正在使用此代码从pdf中提取图像并正常工作：

private static List ExtractImages(String PDFSourcePath) { List ImgList = new List();

        iTextSharp.text.pdf.RandomAccessFileOrArray RAFObj = null;
        iTextSharp.text.pdf.PdfReader PDFReaderObj = null;
        iTextSharp.text.pdf.PdfObject PDFObj = null;
        iTextSharp.text.pdf.PdfStream PDFStremObj = null;

        try
        {
            RAFObj = new iTextSharp.text.pdf.RandomAccessFileOrArray(PDFSourcePath);
            PDFReaderObj = new iTextSharp.text.pdf.PdfReader(RAFObj, null);

            for (int i = 0; i <= PDFReaderObj.XrefSize - 1; i++)
            {
                PDFObj = PDFReaderObj.GetPdfObject(i);

                if ((PDFObj != null) && PDFObj.IsStream())
                {
                    PDFStremObj = (iTextSharp.text.pdf.PdfStream)PDFObj;
                    iTextSharp.text.pdf.PdfObject subtype = PDFStremObj.Get(iTextSharp.text.pdf.PdfName.SUBTYPE);

                    if ((subtype != null) && subtype.ToString() == iTextSharp.text.pdf.PdfName.IMAGE.ToString())
                    {
                        byte[] bytes = iTextSharp.text.pdf.PdfReader.GetStreamBytesRaw((iTextSharp.text.pdf.PRStream)PDFStremObj);

                        if ((bytes != null))
                        {
                            try
                            {
                                System.IO.MemoryStream MS = new System.IO.MemoryStream(bytes);

                                MS.Position = 0;
                                System.Drawing.Image ImgPDF = System.Drawing.Image.FromStream(MS);

                                ImgList.Add(ImgPDF);

                            }
                            catch (Exception)
                            {
                            }
                        }
                    }
                }
            }
            PDFReaderObj.Close();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
        return ImgList;
    }

iTextSharp.text.pdf.RandomAccessFileOrArray RAFObj = null; iTextSharp.text.pdf.PdfReader PDFReaderObj = null; iTextSharp.text.pdf.PdfObject PDFObj = null; iTextSharp.text.pdf.PdfStream PDFStremObj = null; try { RAFObj = new iTextSharp.text.pdf.RandomAccessFileOrArray(PDFSourcePath); PDFReaderObj = new iTextSharp.text.pdf.PdfReader(RAFObj, null); for (int i = 0; i <= PDFReaderObj.XrefSize - 1; i++) { PDFObj = PDFReaderObj.GetPdfObject(i); if ((PDFObj != null) && PDFObj.IsStream()) { PDFStremObj = (iTextSharp.text.pdf.PdfStream)PDFObj; iTextSharp.text.pdf.PdfObject subtype = PDFStremObj.Get(iTextSharp.text.pdf.PdfName.SUBTYPE); if ((subtype != null) && subtype.ToString() == iTextSharp.text.pdf.PdfName.IMAGE.ToString()) { byte[] bytes = iTextSharp.text.pdf.PdfReader.GetStreamBytesRaw((iTextSharp.text.pdf.PRStream)PDFStremObj); if ((bytes != null)) { try { System.IO.MemoryStream MS = new System.IO.MemoryStream(bytes); MS.Position = 0; System.Drawing.Image ImgPDF = System.Drawing.Image.FromStream(MS); ImgList.Add(ImgPDF); } catch (Exception) { } } } } } PDFReaderObj.Close(); } catch (Exception ex) { throw new Exception(ex.Message); } return ImgList; }

但我想要的是在图像中转换PDF的每一页，任何人都可以帮忙吗？