C# & VB.NET Guide: Read PDF-417

public void ScanPDF417FromFile(string filename)
{
  // Set PDF417 as the target barcode symbol and decode them all from an image file.
  BarcodeResult[] results = BarCodeScanner.Scan(filename, BarCodeType.PDF417);

  // APIs for reading PDF417 from Bitmap and Stream of image.
  // public static BarcodeResult[] Scan(Bitmap bitmap, BarCodeType barType);
  // public static BarcodeResult[] Scan(Stream stream, BarCodeType barType);

  foreach (BarcodeResult result in results)
  {
    Console.WriteLine(result.BarType.ToString() + "-" + result.Data);
  }
}

// Use this way to read barcode when there's only one barcode on image.
Bitmap bmp = new Bitmap("YourImagePath");
BarcodeResult barcode = BarCodeScanner.ScanSingle(bmp);
Console.WriteLine("barcode data:{0}.", barcode.Data);

Public Sub ScanAllFromFile(ByVal filename As String)
  ' VB.NET sample code for reading all barcode symbols from an image file.
  Dim results() As BarcodeResult = BarCodeScanner.Scan(filename)

  ' VB.NET APIs for scanning all barcode types from Bitmap and Stream of image.
  ' public static BarcodeResult[] Scan(Bitmap bitmap)
  ' public static BarcodeResult[] Scan(Stream stream)

  Dim result As BarcodeResult
  For Each result In results
    Console.WriteLine(result.BarType.ToString() + "-" + result.Data)
  Next
End Sub

Dim bmp As Bitmap = New Bitmap("YourImagePath") 
Dim barcode As BarcodeResult = BarCodeScanner.ScanSingle(bmp) 
Console.WriteLine("barcode data:{0}.", barcode.Data)