代码之家 › 专栏 › 技术社区 › Matthias

通用应用位图中的ZXing

zxing qr-code win-universal-app c#

0

Matthias · 技术社区 · 10 年前

我有一个旧的ZXing代码,可以很好地与 Bitmaps 但在我的Win10通用应用程序中,我正在使用 BitmapImage 如果ZXing也接受其他人,你能给我一个主意吗 位图图像 ,或者我如何达到它的工作原理?

当我使用 using System.Drawing; 在Win10应用程序的类中,我在编译时遇到错误:

系统未找到MarshalByRefObject

这是我的旧工作代码:

private string DecodeQRCodeFromBitmap(System.Drawing.Bitmap Picture)
{

    dynamic luminanceSource = new ZXing.BitmapLuminanceSource(Picture);
    dynamic binarizer = new ZXing.Common.HybridBinarizer(luminanceSource);


    ZXing.BinaryBitmap bb = new ZXing.BinaryBitmap(binarizer);
    ZXing.Result br = readCode2.decode(bb);
    if (br != null) {
        Interaction.MsgBox(br.ToString);
        return Convert.ToString(br.Text);
    } else {
        return string.Empty;
    }
}

新的不工作代码:

    private string DecodeQRCodeFromBitmap(BitmapImage image)
    {
        dynamic luminanceSource = new ZXing.BitmapLuminanceSource(image);
        dynamic binarizer = new      ZXing.Common.HybridBinarizer(luminanceSource);

        ZXing.BinaryBitmap bb = new ZXing.BinaryBitmap(binarizer);
        ZXing.Result br = readCode.decode(bb);
        if (br != null)
        {
            return Convert.ToString(br.Text);
        }
        else {
            return string.Empty;
        }
    }

1 回复 | 直到 8 年前

1

0

Frank Beutler 10 年前

这是一个在windows通用应用程序中解码条形码的小示例。它在vb.net中,但您可以将其转换为c#…或在工作时问我。。。

Imports Windows.Media.Capture
Imports Windows.Storage.Streams
Imports Windows.Media.MediaProperties

Public NotInheritable Class MainPage
    Inherits Page

    Private capture As MediaCapture

    Private Async Function TakePhoto() As Task
        Try
            capture = New MediaCapture
            Await capture.InitializeAsync
            captureElementPreview.Source = capture
            Await capture.StartPreviewAsync
            Dim res As VideoEncodingProperties = capture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview)
            Dim iep As ImageEncodingProperties = ImageEncodingProperties.CreateBmp
            iep.Height = res.Height
            iep.Width = res.Width
            Dim barcodereader As New ZXing.BarcodeReader With {.AutoRotate = True}
            Dim wb As New WriteableBitmap(res.Width, res.Height)
            Dim result As ZXing.Result = Nothing
            While result Is Nothing
                Using stream = New InMemoryRandomAccessStream()
                    Await capture.CapturePhotoToStreamAsync(iep, stream)
                    stream.Seek(0)
                    Await wb.SetSourceAsync(stream)
                    result = barcodereader.Decode(wb)
                End Using
            End While
            Scanresult.Text = result.Text
            Await capture.StopPreviewAsync
            Debug.WriteLine(Scanresult.Text)
        Catch ex As Exception
            Debug.WriteLine("Exception when taking a photo: {0}", ex.ToString())
        End Try
    End Function

    Private Async Sub buttonCapture_Click(sender As Object, e As RoutedEventArgs)
        Await TakePhoto()
    End Sub

End Class

您需要导入zxing.winrt。dll从zxing库的子文件夹\winrt中删除。我从stackoverflow的另一个帖子中获取了这个代码。很多事情都可以做得更好,但它对第一步有效。。。

问候Frank