Hello,

 I'm testing the aspose.barcode recognition and I want to know if there is some way to recognize a barcode from a pdf file

Hi,

You can surely read BarCode from pdf files using Aspose.BarCode and Aspose.Pdf.Kit components. First, open the pdf file using PdfConverter class of Aspose.pdf.kit library, extract image(s) from it and use Aspose.BarCode to recognize the barcodes from the images.

Please refer to the sample code below: Call ExtractImage() method and modify the license and pdf paths. The trial version will only extract Code39 barcodes. If you want to recognize other barcode symbologies, please ask for a temporary license from http://www.aspose.com/purchase/templicense.aspx

public string ExtractImage()

string strBarCodes = "";

PdfConverter converter = new PdfConverter();

// bind converter object to pdf stream

converter.BindPdf(@"c:\temp\sample.pdf");

//Calling HasNextImage method in while loop. When images will finish, loop will exit

while (converter.HasNextImage())

//Call GetNextImage method to store image as a file

MemoryStream imageStream = new MemoryStream();

// read the barcode from this image

String barcodeText = GetBarCodeText(imageStream);

if (barcodeText != null)

strBarCodes += barcodeText + Environment.NewLine;

else

strBarCodes += "NO_BARCODE_FOUND" + Environment.NewLine;

return strBarCodes;

private String GetBarCodeText(MemoryStream imageStream)

// set the license file

Aspose.BarCode.License lic = new Aspose.BarCode.License();

lic.SetLicense(@"c:\Aspose.Total.lic");

// create bitmap from stream

Bitmap bitmap = new Bitmap(imageStream);

//Create a barcode reader

BarCodeReader reader = new BarCodeReader(bitmap);

// reader settings

reader.SymbologyType = Symbology.DataMatrix;

// perform scan

Aspose.BarCode.BarCodeInfo[] result;

if (result.Length > 0)

return result[0].CodeText;

// barcode not found.

return null;