Q:

The path (ImageSource) in WinRT to display an image that is saved in Pictures folder (not in app packages)

So, i've saved my image in 
StorageFile picture = await KnownFolders.PicturesLibrary.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);

and  i want to display it in XAML : 
 <Image  Grid.Row="1"
                Grid.Column="0"
                x:Name="Photo"
                Source="ms-appx:///Pictures/test.png"
                VerticalAlignment="Center"
                HorizontalAlignment="Left"
                Stretch="Fill"
                Width="1024"
                Height="768">
        </Image>

and it's not working :(
Thank you very much for you help :)

A:

There aren't any uri schemes that work with a pictures library.
You wouldn't typically hard-code a URI to a pictures library file in your XAML anyway since you can't rely on that file being there.
If you store a list of files by paths somewhere you'd still have to load them using some code - perhaps using future access list, opening streams to the files etc.
You could probably create an IValueConverter or an attached behavior/DependencyProperty to convert a string to an ImageSource, but you could just as well do that in your view model.

