CODEWITHSUNDEEP
c#wpfqr-codezxing
Rifat Murtuza
Rifat Murtuza

Reputation: 1281

QRCodeWriter in Zxing in C# To Create QR code Image

Hello I want to make a image of QR code using QRCodeWriter class . Yes I can create Bar code Image using BarcodeWriter But I need to create Using QR code Writter Class I found a solution but that is very old in stackoverflow in here QRCodeWritter Creating QR Code but here is a problem and the problem is if (matrix.get_Renamed(x, y) == -1) There is no method getrenamed I tried this but failed here is the method I got enter image description here

Please Note that this matrix is BitMatrix matrix from ZXing.Common.BitMatrix . How to create and solve this thanks in advance .

Upvotes: 1

Views: 527

Answers (2)

IV.
IV.

Reputation: 9438

With a [WPF] tag specifically, using ZXing.QrCode.QRCodeWriter(), the question is how to create a QRCode image . I had the same question when I got here, and have been finding it surprisingly difficult to find a straightforward answer to this in the "latest" ZXing version: <PackageReference Include="ZXing.Net" Version="0.16.9" /> in 2025.

So I muddled through it on my own and here's what worked for me:

private static ImageSource GenerateQRCode(string qrText)
{
    var bitMatrix = 
        new QRCodeWriter()
        .encode(qrText, BarcodeFormat.QR_CODE, 150, 150);
    int width = bitMatrix.Width;
    int height = bitMatrix.Height;
    int stride = (width + 7) / 8;
    byte[] pixels = new byte[width * height];
    for (int y = 0; y < height; y++)
    {
        for (int x = 0; x < width; x++)
        {
            pixels[y * width + x] = bitMatrix[x, y] ? (byte)0 : (byte)255;
        }
    }
    BitmapSource bitmapSource = BitmapSource.Create(
        width,
        height,
        96,
        96,
        PixelFormats.Gray8, 
        null,
        pixels,
        width 
    );
    return bitmapSource;
}

result

Usage

As a point of reference, my WPF view model has this singleton:

partial class UniqueNumberItem : ObservableObject
{
    public ImageSource QRCode
    {
        get
        {
            if (qrCode is null)
            {
                qrCode = GenerateQRCode(UniqueNumber);
            }
            return qrCode;
        }
    }
    ImageSource? qrCode = default;
    .
    .
    .
}

Binding

It is bound in this manner:

<DataTemplate x:Key="PrintTemplate">
    <Border 
    BorderThickness="2" 
    BorderBrush="Black" 
    CornerRadius="10" 
    Padding="10" 
    Margin="10">
        <Grid Margin="10">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>

            <Image Source="{Binding QRCode}" 
                Width="150" Height="150" 
                HorizontalAlignment="Center" 
                Grid.Row="0" />

            <TextBlock Text="{Binding WNR}" 
                    FontSize="16" 
                    HorizontalAlignment="Center" 
                    Grid.Row="1"/>

            <TextBlock Text="{Binding UniqueNumber}" 
                    FontSize="16" 
                    FontWeight="Bold" 
                    HorizontalAlignment="Center" 
                    Grid.Row="2"/>

            <TextBlock Text="{Binding Matnr}" 
                    FontSize="16" 
                    FontStyle="Italic" 
                    HorizontalAlignment="Center" 
                    Grid.Row="3"/>
        </Grid>
    </Border>
</DataTemplate>

Upvotes: 0

Michael
Michael

Reputation: 2506

You have to use the indexer if (matrix[x, y])

Upvotes: 0

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