CODEWITHSUNDEEP
windows-runtimeqr-code
Vikram Ranabhatt
Vikram Ranabhatt

Reputation: 7630

QrCode Open Source Library for WinRT

I need to generate the Qr Code for my Windows 8 Store App.Is there any Open Source Qr Code Library which is based on Win Rt.

Upvotes: 2

Views: 1226

Answers (3)

Wilson Wu
Wilson Wu

Reputation: 2053

You can use the ZXing.NET: https://zxingnet.codeplex.com/

Code for load image to get QR Code result:

        FileOpenPicker openPicker = new FileOpenPicker();
        openPicker.ViewMode = PickerViewMode.Thumbnail;
        openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
        openPicker.FileTypeFilter.Add(".png");
        openPicker.FileTypeFilter.Add(".jpg");
        openPicker.FileTypeFilter.Add(".bmp");

        StorageFile file = await openPicker.PickSingleFileAsync();
        if (null != file)
        {
            try
            {
                BitmapImage bitmap = new BitmapImage();
                using (IRandomAccessStream fileStream1 = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
                {
                    bitmap.SetSource(fileStream1);
                }
                using (IRandomAccessStream fileStream2 = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
                {
                    WriteableBitmap writeableBitmap = new WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight);
                    writeableBitmap.SetSource(fileStream2); IBarcodeReader reader = new BarcodeReader();
                    var result = reader.Decode(writeableBitmap);
                    txt1.Text = result.ToString();
                }

            }
            catch (Exception exception)
            {
                //
            }
        }

Code for get QR from camera (use the MSDN demo: http://code.msdn.microsoft.com/windowsapps/CameraCaptureUI-Sample-845a53ac and customized):

    private async void CapturePhoto_Click(object sender, RoutedEventArgs e)
    {
        try
        {
            rootPage.NotifyUser("", NotifyType.StatusMessage);

            // Using Windows.Media.Capture.CameraCaptureUI API to capture a photo
            CameraCaptureUI dialog = new CameraCaptureUI();
            Size aspectRatio = new Size(1, 1);
            dialog.PhotoSettings.CroppedAspectRatio = aspectRatio;

            StorageFile file = await dialog.CaptureFileAsync(CameraCaptureUIMode.Photo);
            if (file != null)
            {
                BitmapImage bitmapImage = new BitmapImage();

                using (IRandomAccessStream fileStream1 = await file.OpenAsync(FileAccessMode.Read))
                {
                    bitmapImage.SetSource(fileStream1);
                }
                CapturedPhoto.Source = bitmapImage;
                ResetButton.Visibility = Visibility.Visible;

                ZXing.BarcodeReader br = new ZXing.BarcodeReader();
                WriteableBitmap wrb = new WriteableBitmap(bitmapImage.PixelWidth, bitmapImage.PixelHeight);
                BitmapImage img = new BitmapImage();
                img.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
                using (IRandomAccessStream fileStream2 = await file.OpenAsync(FileAccessMode.Read))
                {
                    wrb.SetSource(fileStream2);
                }
                var res = br.Decode(wrb);
                rootPage.NotifyUser(res.ToString(), NotifyType.ErrorMessage);

            }
            else
            {
                rootPage.NotifyUser("No photo captured.", NotifyType.StatusMessage);
            }
        }
        catch (Exception ex)
        {
            rootPage.NotifyUser(ex.Message, NotifyType.ErrorMessage);
        }
    }

Upvotes: 2

Bajju
Bajju

Reputation: 935

I have made use of zxing library which is available on codeplex.

The method I wrote is as follows:

I'm making use of the DecodeQRcode with storage file from the camera's CaptureFileAsync method which returns the storage file of the qrImgage.

public async void DecodeQRCode(StorageFile file)
{
        // load a jpeg, be sure to have the Pictures Library capability in your manifest

        var data = await FileIO.ReadBufferAsync(file);

        // create a stream from the file
        var ms = new InMemoryRandomAccessStream();
        var dw = new Windows.Storage.Streams.DataWriter(ms);
        dw.WriteBuffer(data);
        await dw.StoreAsync();
        ms.Seek(0);

        // find out how big the image is, don't need this if you already know
        var bm = new BitmapImage();
        await bm.SetSourceAsync(ms);

        // create a writable bitmap of the right size
        var wb = new WriteableBitmap(bm.PixelWidth, bm.PixelHeight);
        ms.Seek(0);

        // load the writable bitpamp from the stream
        await wb.SetSourceAsync(ms);

        var lsource = new BitmapLuminanceSource(wb);

        var binarizer = new HybridBinarizer(lsource);
        var bbmp = new BinaryBitmap(binarizer);

        var c = new QRCodeReader();
       Result res= c.decode(bbmp);
    }

While taking the image of the QR code you must make sure that you crop the image properly or else you won't get the expected result.

Upvotes: 4

Jim O'Neil
Jim O'Neil

Reputation: 23784

I have not used this, but ZXing.Net is....

A library which supports decoding and generating of barcodes (like QR Code, PDF 417, EAN, UPC, Aztec, Data Matrix, Codabar) within images.

and has assembles available for WindowsRT (as well as phone)

Upvotes: 2

Related Questions