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PDF中有水印,但是转图片后,图片中没有水印

        //1.选择pdf文件

        var dialog = new OpenFileDialog();
        dialog.Filter = "pdf文件|*.pdf";
        var dialogResult = dialog.ShowDialog();
        if (dialogResult != System.Windows.Forms.DialogResult.OK)
        {
            return;
        }

        //和选择的文件并列创建一个目录
        string filePath = dialog.FileName;
        string directoryPath = filePath + "目录";
        //aspose许可证
        Aspose.Pdf.License l = new Aspose.Pdf.License();
        string licenseName = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Aspose.Pdf.lic");
        l.SetLicense(licenseName);
        //定义Jpeg转换设备
        Aspose.Pdf.Document document = new Aspose.Pdf.Document(filePath);
        string path = Path.Combine(directoryPath, string.Format("{0}.pptx", "111"));
        document.Save(path,SaveFormat.Pptx);

        var device = new Aspose.Pdf.Devices.JpegDevice();
        Directory.CreateDirectory(directoryPath);
        //默认质量为100,设置质量的好坏与处理速度不成正比,甚至是设置的质量越低反而花的时间越长,怀疑处理过程是先生成高质量的再压缩
        device = new Aspose.Pdf.Devices.JpegDevice(100);
        //遍历每一页转为jpg
        for (var i = 1; i <= document.Pages.Count; i++)
        {
            string filePathOutPut = Path.Combine(directoryPath, string.Format("{0}.jpg", i));
            FileStream fs = new FileStream(filePathOutPut, FileMode.Create);
            try
            {
                foreach (Artifact artifact2 in document.Pages[i].Artifacts)
                {
                    MessageBox.Show(artifact2.Subtype + " " + artifact2.Text + " " + artifact2.Rectangle);
                }
                //device.Process(document.Pages[i], fs);
                Resolution resolution = new Resolution(300);
                PngDevice pngDevice = new PngDevice(resolution);

                // Convert a particular page and save the image to stream
                pngDevice.Process(document.Pages[i], fs);
                fs.Close();
            }
            catch (Exception ex)
            {
                fs.Close();
                File.Delete(filePathOutPut);
            }
        }

@laohu001

你能否分享一些关于你的问题的更多细节?

在此处附上您的输入、有问题的输出和预期的输出文件以进行测试。 我们将调查该问题并为您提供更多信息。 谢谢你的合作。

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