如何获取GestureCompleted上图像的来源

Question

I want to find the URI of an Image on the phone screen when the image is dragged. I have many images on the screen and I need to know which one has been dragged, I can easily find that from the filename of the image as they are named A.png, B.png and so on .

    private void OnGestureCompleted(object sender, Microsoft.Phone.Controls.GestureEventArgs e){
        Image image = sender as Image;
        TranslateTransform transform = image.RenderTransform as TranslateTransform;
        //storing the final values after the gesture is complete
        xFin = (e.GetPosition(null).X);
        yFin = (e.GetPosition(null).Y);
        //failed attempts to convert adress to string
        MessageBox.Show(image.Source.ToString());
    }

This returns System.Windows.Controls.Image . and this on the other hand throws an exception stating that ConvertToString hasn't been implemented.

ImageSourceConverter convertor = new ImageSourceConverter();
string location = convertor.ConvertToString(image);
MessageBox.Show(location);

Is there some way this can be done?

Answer 1

If you know that the Source property is BitmapImage (which it probably is if you are passing in a URI to the Image in the Source property in XAML) then you can use UriSource:

MessageBox.Show(((BitmapImage)image.Source).UriSource.ToString());

I suggest you use the Tag property of the Image control to store the info you need though. More scalable robust in the long run.