使用C＃将PDF文件转换为字节数组或将字节数组转换为PDF

ByteArraytoPDF.cs

// 加载输入文件
string inputFile = dataDir + @"Test.PNG";

// 初始化字节数组
byte[] buff = null;
FileStream fs = new FileStream(inputFile, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
long numBytes = new FileInfo(inputFile).Length;

// 将输入图像加载到字节数组中
buff = br.ReadBytes((int)numBytes);


Document doc = new Document();
// 将页面添加到文档的页面集合
Page page = doc.Pages.Add();
// 将源图像文件加载到Stream对象
MemoryStream outstream = new MemoryStream();
MemoryStream mystream = new MemoryStream(buff);
// 使用加载的图像流实例化BitMap对象
Bitmap b = new Bitmap(mystream);

// 设置边距，以使图像适合等。
page.PageInfo.Margin.Bottom = 0;
page.PageInfo.Margin.Top = 0;
page.PageInfo.Margin.Left = 0;
page.PageInfo.Margin.Right = 0;

page.CropBox = new Aspose.Pdf.Rectangle(0, 0, b.Width, b.Height);
// 创建一个图像对象
Aspose.Pdf.Image image1 = new Aspose.Pdf.Image();
// 将图像添加到本节的段落集合中
page.Paragraphs.Add(image1);
// 设置图像文件流
image1.ImageStream = mystream;

// 保存结果PDF文件
doc.Save(outstream, SaveFormat.Pdf);
//doc.Save(dataDir + "outstream.pdf", SaveFormat.Pdf);

// 关闭memoryStream对象
mystream.Close();

PDFtoByteArray.cs

dataDir = @"D:\Test\";

// 加载输入的PDF文件
string inputFile = dataDir + @"testpdf.pdf";

// 初始化字节数组
byte[] buff = null;

// 初始化FileStream对象
FileStream fs = new FileStream(inputFile, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
long numBytes = new FileInfo(inputFile).Length;

// 将文件内容加载到字节数组中
buff = br.ReadBytes((int) numBytes);
fs.Close();

// 使用字节数组处理PDF文件
ConvertPDFToJPEG(buff, 300, dataDir);


public static void ConvertPDFToJPEG(Byte[] PDFBlob, int resolution, string dataDir)
{
    // 打开文件
    using (MemoryStream InputStream = new MemoryStream(PDFBlob))
    {
        Aspose.Pdf.Document pdfDocument = new Aspose.Pdf.Document(InputStream);

        for (int pageCount = 1; pageCount <= pdfDocument.Pages.Count; pageCount++)
        {

            using (FileStream imageStream = new FileStream(dataDir + "image" + pageCount + "_out" + ".jpg", FileMode.Create))
            {
                // 创建具有指定属性的JPEG设备
                // 宽度，高度，分辨率，质量
                // 品质[0-100]，最高为100
                // 创建分辨率对象

                Aspose.Pdf.Devices.Resolution res = new Aspose.Pdf.Devices.Resolution(resolution);
                // JpegDevice jpegDevice = new JpegDevice(500, 700, resolution, 100);

                // 添加以下内容以确定是否景观
                Int32 height, width = 0;

                PdfFileInfo info = new PdfFileInfo(pdfDocument);
                width = Convert.ToInt32(info.GetPageWidth(pdfDocument.Pages[pageCount].Number));
                height = Convert.ToInt32(info.GetPageHeight(pdfDocument.Pages[pageCount].Number));


                Aspose.Pdf.Devices.JpegDevice jpegDevice =
                //new Aspose.Pdf.Devices.JpegDevice(Aspose.Pdf.PageSize.A4, res, 100);
                new Aspose.Pdf.Devices.JpegDevice(width, height, res, 100);
                // Convert a particular page and save the image to stream

                //Aspose.Pdf.PageSize.A4.IsLandscape = true;
                jpegDevice.Process(pdfDocument.Pages[pageCount], imageStream);
                // 关闭流
                imageStream.Close();
            }
        }
    }
}