How to use the Zxing barcode scanner library along with the Aforge webcam library-CodePudding

I have a program in which I use the Aforge library for viewing a webcam. This works wonder:

LocalWebcamsCollection = new FilterInfoCollection(FilterCategory.VideoInputDevice);
LocalScannerBarcode = new VideoCaptureDevice(LocalWebcamsCollection[WebcamNumber].MonikerString);
LocalScannerBarcode.NewFrame  = LocalScannerBarcode_NewFrame;
LocalScannerBarcode.Start();

and in the new frame event I get the bitmap

System.Drawing.Bitmap frame;    
void LocalScannerBarcode_NewFrame(object sender, AForge.Video.NewFrameEventArgs eventArgs)
{
    frame = (System.Drawing.Bitmap)eventArgs.Frame.Clone();
}

now I have to decode what is seen. Basically I have to pass the bitmap to decode. So global I have;

ZXing.BarcodeReader bcr;

and into the event LocalScannerBarcode_NewFrame

if (bcr == null)
        bcr = new ZXing.BarcodeReader();

but as soon as I put the two lines above the event is not called anymore.

Please notice that in Windows forms that works but I have to do it in WPF.

Thanks

CodePudding user response：

Not sure if this helps but have you tried putting the reference to the ZXing library in another project? Something an Helper.

So in you project you will have:

string strResult = Helper.ReadBarcode(frame);
if (strResult != null)
{
            ... do stuff with the string
}

and in the helper

static ZXing.BarcodeReader bcr;
public static string ReadBarcode(System.Drawing.Bitmap bmp)
{
    if (bcr == null)
        bcr = new ZXing.BarcodeReader();
    return bcr.Decode(bmp).ToString();
}