WP7 BarcodeManager - Invalid cross-thread access
- by rpf
I'm trying to use Windows Phone 7 Silverlight ZXing Barcode Scanning Library but I'm having some problems.
I'm using a background worker to check the image, but when I do this:
WP7BarcodeManager.ScanBarcode(this.Image, BarcodeResults_Finished);
The code throws an exception: Invalid cross-thread access.
Here is my code...
void photoChooserTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
ShowImage();
System.Windows.Media.Imaging.BitmapImage bmp = new System.Windows.Media.Imaging.BitmapImage();
bmp.SetSource(e.ChosenPhoto);
imgCapture.Source = bmp;
this.Image = new BitmapImage();
this.Image.SetSource(e.ChosenPhoto);
progressBar.Visibility = System.Windows.Visibility.Visible;
txtStatus.Visibility = System.Windows.Visibility.Collapsed;
worker.RunWorkerAsync();
}
else
ShowMain();
}
void worker_DoWork(object sender, DoWorkEventArgs e)
{
try
{
Thread.Sleep(2000);
WP7BarcodeManager.ScanMode = com.google.zxing.BarcodeFormat.UPC_EAN;
WP7BarcodeManager.ScanBarcode(this.Image, BarcodeResults_Finished);
}
catch (Exception ex)
{
Debug.WriteLine("Error processing image.", ex);
}
}
How can I solve this?
