Question

In a GridView, I’ve templated the items so an Image control inside that template receives an Uri using a binding (also tried with BitmapImage) to show a picture file. It works, but I cannot delete those files because those files are blocked. Even if I clear the collection feeding the GridView.ItemsSource, and even if I call GC.Collect(), they are still blocked.

Thanks to Philip for his working suggestion… as I used a Converter to feed a BitmapImage to every Image control, found some particular things had to do to make it work, and here it is for future reference:

InMemoryRandomAccessStream Ras = new InMemoryRandomAccessStream();
var archivo = CartoonsDownloader.FolderImagenes.GetFileAsync(TheFileName);

var fileStream = CartoonsDownloader.FolderImagenes.OpenStreamForReadAsync(TheFileName);
fileStream.Result.CopyTo(Ras.AsStreamForWrite());

BitmapImage MapaDeBits = new BitmapImage();
// Even it's RANDOM, I have to manually "Seek" it at 0.
Ras.Seek(0);
MapaDeBits.SetSource(Ras);
MapaDeBits.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
return MapaDeBits;

Answer 1

This could be a bug in the XAML stack (so you could report it on MSDN forums), or just a side effect of its nature of caching images. As an alternative – you can open the file yourself and set the image using the SetSource method. Then you should have better control over the file access.