如何在Winui 3应用程序中显示位图对象

发布于 2025-02-05 10:24:49 字数 804 浏览 3 评论 0原文

从qrcoder i获得system.bitmap对象：

            QRCodeGenerator qrCodeGenerator = new();
            QRCodeData qrCodeData = qrCodeGenerator.CreateQrCode(associateSoftwareTokenResponse.SecretCode, QRCodeGenerator.ECCLevel.Q);
            QRCode qrCode = new(qrCodeData);
            Bitmap qrCodeBitmap = qrCode.GetGraphic(20);

然后将其分配给XAML image control：qrcodeimage.source = qrcodebitmapmap给出了一个错误：

错误CS0029无法将类型'System.Drawing.BitMap'转换为 'microsoft.ui.xaml.media.imagesource'

，显然仍然需要一些转换。

我设法找到的所有文档和示例说明了如何从文件中打印图像，而不是位图对象。

如何在Winui 3应用中显示此代码生成的位图？

原文

I want to display QR code generated by QRCoder library ( https://github.com/codebude/QRCoder/ ) in my WinUI 3 desktop app.

From QRCoder I get System.Drawing.Bitmap object:

            QRCodeGenerator qrCodeGenerator = new();
            QRCodeData qrCodeData = qrCodeGenerator.CreateQrCode(associateSoftwareTokenResponse.SecretCode, QRCodeGenerator.ECCLevel.Q);
            QRCode qrCode = new(qrCodeData);
            Bitmap qrCodeBitmap = qrCode.GetGraphic(20);

Then assigning it to XAML Image control: qrCodeImage.Source = qrCodeBitmap gives an error:

Error CS0029 Cannot implicitly convert type 'System.Drawing.Bitmap' to
'Microsoft.UI.Xaml.Media.ImageSource'

So apparently there is still some conversion needed.

All documentation and examples I managed to find explain how to print an image from file but not Bitmap object.

How can I display this code generated Bitmap in my WinUI 3 app?

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夜清冷一曲。 2025-02-12 10:24:49

您应该能够从类似的流中创建bitmapimage：

Bitmap qrCodeBitmap = ...;
BitmapImage bitmapImage = new BitmapImage();
using (MemoryStream stream = new MemoryStream())
{
    qrCodeBitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
    stream.Position = 0;
    bitmapImage.SetSource(stream.AsRandomAccessStream());
}
image.Source = bitmapImage;

You should be able to create a BitmapImage from a stream something like this:

Bitmap qrCodeBitmap = ...;
BitmapImage bitmapImage = new BitmapImage();
using (MemoryStream stream = new MemoryStream())
{
    qrCodeBitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
    stream.Position = 0;
    bitmapImage.SetSource(stream.AsRandomAccessStream());
}
image.Source = bitmapImage;

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