Hi there,

I am using Infragistics BarcodeReader to process some documents. But the BarcodeReader behaves quite strange.

While it is scanning the same file, sometimes it give a barcode. Sometimes it doesn't.And sometimes it just throws exceptions ('System.OutOfMemoryException',  System.Runtime.InteropServices.COMException).

What I basically do is to convert some PDF's to PNG and let the Infragistics BarcodeReader decode the QR code, and I have tested with the following 3 files.

C:\Temp\Test\SConbitScan42990006.001.04-Certificate.pdf
C:\Temp\Test\SConbitScan42990006.001.03-Certificate.pdf
C:\Temp\Test\SConbitScan42990006.002.02-Certificate.pdf

And their corresponding PNG's

C:\Temp\Test\QrFolder\SConbitScan42990006.001.04-Certificate.pdf.png
C:\Temp\Test\QrFolder\SConbitScan42990006.001.03-Certificate.pdf.png
C:\Temp\Test\QrFolder\SConbitScan42990006.002.02-Certificate.pdf.png

All files are included in the sample.

Main parts of the code:

        private static void ReadQrCode(string fileName)
        {
            var barcodeReader = new BarcodeReader();
            barcodeReader.DecodeComplete += BarcodeReader_DecodeComplete;
            var image = new BitmapImage(new Uri(fileName, UriKind.Relative));

            //Decoding an image.
            try
            {
                Console.WriteLine($"File name: {fileName}");
                barcodeReader.Decode(image);
            }
            catch (Exception e)
            {
                ...
            }
            finally
            {
                image = null;
                barcodeReader = null;
                GC.Collect();
            }
        }

        private static void BarcodeReader_DecodeComplete(object sender, ReaderDecodeArgs e)
        {
            var text = e.SymbolFound ? e.Value : "No QR code found";
           
            Console.WriteLine($"QR CODE: { text}\n ======== ");
        }

And the outputs in CONSOLE:

Exception of type 'System.OutOfMemoryException' was thrown. System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.    at Infragistics.Controls.Barcodes.ImageProcessing.ConvertGrayScaleToRgb(Array pixels, Boolean hasAlpha)    at Infragistics.Controls.Barcodes.ImageProcessing.CreateImageFromPixelsArray(Byte[][] data, ImageData imageData, Boolean isImageZoomed)    at Infragistics.Controls.Barcodes.BarcodeReader.Decode(BitmapSource bitmap, Symbology symbologyTypes)    at Infragistics.Controls.Barcodes.BarcodeReader.Decode(BitmapSource bitmap)    at InfraBarcodeScannerConsole.Program.ReadQrCode(String fileName) in C:\Users\nawed\Desktop\WorkSpaceVS\TestApplication\InfraBarcodeScannerConsole\Program.cs:line 110

Insufficient memory to continue the execution of the program. System.OutOfMemoryException: Insufficient memory to continue the execution of the program.    at System.Windows.Media.Imaging.WriteableBitmap..ctor(Int32 pixelWidth, Int32 pixelHeight, Double dpiX, Double dpiY, PixelFormat pixelFormat, BitmapPalette palette)    at Infragistics.Controls.Barcodes.ImageProcessing.CreateImageFromPixelsArray(Byte[][] data, ImageData imageData, Boolean isImageZoomed)    at Infragistics.Controls.Barcodes.BarcodeReader.Decode(BitmapSource bitmap, Symbology symbologyTypes)    at Infragistics.Controls.Barcodes.BarcodeReader.Decode(BitmapSource bitmap)    at InfraBarcodeScannerConsole.Program.ReadQrCode(String fileName) in C:\Users\nawed\Desktop\WorkSpaceVS\TestApplication\InfraBarcodeScannerConsole\Program.cs:line 110

MILERR_WIN32ERROR (Exception from HRESULT: 0x88980003) System.Runtime.InteropServices.COMException (0x88980003): MILERR_WIN32ERROR (Exception from HRESULT: 0x88980003)    at System.Windows.Media.Imaging.WriteableBitmap..ctor(Int32 pixelWidth, Int32 pixelHeight, Double dpiX, Double dpiY, PixelFormat pixelFormat, BitmapPalette palette)    at Infragistics.Controls.Barcodes.ImageProcessing.CreateImageFromPixelsArray(Byte[][] data, ImageData imageData, Boolean isImageZoomed)    at Infragistics.Controls.Barcodes.BarcodeReader.Decode(BitmapSource bitmap, Symbology symbologyTypes)    at Infragistics.Controls.Barcodes.BarcodeReader.Decode(BitmapSource bitmap)    at DCMConsoleApplication.Program.ReadQrCode(String fileName) in C:\Users\nawed\Desktop\WorkSpaceVS\TestApplication\InfraBarcodeScannerConsole\Program.cs:line 110

File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.04-Certificate.pdf.png
QR CODE: 33KC42990006.001.04
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.04-Certificate.pdf.png
QR CODE: 33KC42990006.001.04
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.04-Certificate.pdf.png
QR CODE: No QR code found
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.04-Certificate.pdf.png
QR CODE: 33KC42990006.001.04

 ========

File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.03-Certificate.pdf.png
QR CODE: No QR code found
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.03-Certificate.pdf.png
QR CODE: 33KC63490101.014.01
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.03-Certificate.pdf.png
QR CODE: 33KC63490101.014.01
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.03-Certificate.pdf.png
QR CODE: 33KC63490101.014.01

 ========

File name: C:\Temp\Test\QrFolder\SConbitScan42990006.002.02-Certificate.pdf.png
QR CODE: No QR code found
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.002.02-Certificate.pdf.png
QR CODE: 33KC63490101.014.01
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.002.02-Certificate.pdf.png
QR CODE: No QR code found
 ========
File name: C:\Temp\Test\QrFolder\SConbitScan42990006.002.02-Certificate.pdf.png
QR CODE: 33KC63490101.014.01

 ========

File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.03-Certificate.pdf.png
QR CODE: No QR code found

 ========

File name: C:\Temp\Test\QrFolder\SConbitScan42990006.001.04-Certificate.pdf.png
QR CODE: 33KC42990006.001.04

 ========

THE PNG FILES WERE TOO BIG FOR UPLOAD I GUESS.