我想使用 C# 读取 pdf 文件中包含的 pdf417 条形码的内容。我写了以下代码:
[...]
// bind the pdf document
Aspose.Pdf.Facades.PdfExtractor pdfExtractor = new Aspose.Pdf.Facades.PdfExtractor();
pdfExtractor.BindPdf(ImageFullPath);
pdfExtractor.StartPage = 1;
pdfExtractor.EndPage = 1;
// extract the images
pdfExtractor.ExtractImage();
//save images to stream in a loop
while (pdfExtractor.HasNextImage())
{
// save image to stream
MemoryStream imageStream = new MemoryStream();
pdfExtractor.GetNextImage(imageStream);
imageStream.Position = 0;
// recognize the barcode from the image stream above
System.Drawing.Image img = Image.FromStream(imageStream);
Aspose.BarCodeRecognition.BarCodeReader barcodeReader = new Aspose.BarCodeRecognition.BarCodeReader(imageStream, BarCodeReadType.Pdf417);
while (barcodeReader.Read())
{
Console.WriteLine("Codetext found: " + barcodeReader.GetCodeBytes());
}
// close the reader
barcodeReader.Close();
}
Console.WriteLine("Done");
[...]
我知道条形码的内容是“OB|090547db800b6c47”:问题是我得到的输出是“Codetext found: OBAQAQOB|0*6AJAFEHdbhDrh”。有谁知道我做错了什么?