ZXing.Net.Mobile Sample.WindowsUniversal Sample Not Scanning - win-universal-app

Question

Testing this to incorporate into Win 10 UWP app to scan 1D barcodes (format 39 & 128). I have updated latest through nuget 2.0.4.46. Referenced post at http://www.yortondotnet.com/2015/07/mobile-barcode-scanning-with-zxingnet.html regarding some options setting prior to scan() with no luck. The scanner (camera) opens but never recognizes a barcode scan successfully - or failure for that matter. It seems nothing is happening whatsoever. I have included straight, pertinent sample code with some options modifications for review. I have gotten Scandit API to work and was going to try Manateeworks but both are really costly and not an option. I am developing on Surface Pro 3 (Win 10) and that build will also be target machines when complete.
public sealed partial class MainPage : Page
{
UIElement customOverlayElement = null;
MobileBarcodeScanner scanner;
public MainPage()
{
this.InitializeComponent();
//Create a new instance of our scanner
scanner = new MobileBarcodeScanner(this.Dispatcher);
scanner.Dispatcher = this.Dispatcher;
}
private void buttonScanDefault_Click(object sender, RoutedEventArgs e)
{
//Tell our scanner to use the default overlay
scanner.UseCustomOverlay = false;
//We can customize the top and bottom text of our default overlay
scanner.TopText = "Hold camera up to barcode";
scanner.BottomText = "Camera will automatically scan barcode\r\n\r\nPress the 'Back' button to Cancel";
// GWS Set Options
var options = new MobileBarcodeScanningOptions();
options.PossibleFormats = new List<ZXing.BarcodeFormat>() {
ZXing.BarcodeFormat.CODE_39, ZXing.BarcodeFormat.CODE_128
};
options.AutoRotate = false;
options.TryHarder = false;
options.TryInverted = false;
//Start scanning
scanner.Scan(options).ContinueWith(t =>
{
if (t.Result != null)
HandleScanResult(t.Result);
});
}
private void buttonScanContinuously_Click(object sender, RoutedEventArgs e)
{
//Tell our scanner to use the default overlay
scanner.UseCustomOverlay = false;
//We can customize the top and bottom text of our default overlay
scanner.TopText = "Hold camera up to barcode";
scanner.BottomText = "Camera will automatically scan barcode\r\n\r\nPress the 'Back' button to Cancel";
// GWS Set Options
var options = new MobileBarcodeScanningOptions();
options.PossibleFormats = new List<ZXing.BarcodeFormat>() {
ZXing.BarcodeFormat.CODE_39, ZXing.BarcodeFormat.CODE_128
};
options.AutoRotate = false;
options.TryHarder = false;
options.TryInverted = false;
//Start scanning
scanner.ScanContinuously(options, async (result) =>
{
var msg = "Found Barcode: " + result.Text;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async () =>
{
await MessageBox(msg);
});
});
}
async void HandleScanResult(ZXing.Result result)
{
string msg = "";
if (result != null && !string.IsNullOrEmpty(result.Text))
msg = "Found Barcode: " + result.Text;
else
msg = "Scanning Canceled!";
await MessageBox(msg);
}
}

Answer 1

Simon,
I have the exact same problem. I tested your code with the latest nuget 2.1.47, the problem still exists.
You need to download the latest from Github and add the following projects (or DLLs) to your project:
ZXing.Net (project: zxing.portable.csproj)
ZXing.Net.Mobile.Core
ZXing.Net.Mobile.WindowsUniversal
I have tested your code and it works fine. I hope this help.
Cheers,
Sam

Answer 2

I think that the problem in the hardware you are testing with. Surface Pro 3 (Win 10) does not have an auto focus camera. I've never succeed to scan with ZXing using my Surface Pro 3, while the same application is working fine with my other windows 10 device.