Question

My understanding is that when I set SL5 to run OOB and elevated trust that I should have wide open access to any directory/file on the local system. If an external system places png image files into the user’s c:\images folder, how can I load the various png files into a XAML Image element?

This line works:

image.UriSource = new Uri(value as string);

if I set value to a string like “http://blah.com/image1.png”

But fails if I try to set it to:

ImageUrl = new Uri(@"C:\images\image3.png")

which gets resolved to something like “file:///C:…..” when it hits the

image.UriSource = new Uri(value as string);

line.

How do I display png files in SL5 from any local path on the system running the OOB elevated app?

Answer 1

Something like this should work provided that you have elevated permissions set correctly

  var bmp = new BitmapImage();
  var stream = new FileStream(@"c:\dir\folder\image.png", FileMode.Open);
  bmp.SetSource(stream);
  stream.Close();

If you need to use a uri, this should work:

  var bmp = new BitmapImage();      
  var uri = new Uri("c:/dir/folder/image.png");
  bmp.UriSource = uri;

Note that the paths are different. The uri path requires forward slashes to be used.

You can then set the source of your image control to the bmp

  image.Source = bmp;

If you’re getting a ‘File Operation not permitted’ exception you need to double check that elevated permissions is checked in your out of browser settings

Project -> Properties -> ‘Out of browser settings’

Check ‘Require elevated trust…’