Silverlight 4 local file access

Add item ;. ProcessFolder dir, item. Items ;. Perhaps the most interesting part of the source code is how it generates thumbnail images. It uses a BitmapImage to decode each image file. Render with a ScaleTransform to generate a thumbnail, and then, strangely enough, makes a copy of the WriteableBitmap in another WriteableBitmap.

At first glance, this may appear gratuitous. Why not just assign the BitmapImage created from the image file directly to the Image that displays the thumbnail on the screen? Furthermore, why go to the trouble of making a copy of the WriteableBitmap? The short answer is that I did it this way to avoid out-of-memory exceptions, which are all too common in Silverlight applications that display digital photos. Stay tuned. Skip to content In my last blog post , I wrote about Silverlight 4 applications that run outside the browser with elevated permissions and their ability to leverage COM automation servers on the host PC.

Visible; MyMusicBlock. Visible; MyDocsListBox. Visible; MyMusicListBox. Visible; MoveDocsToMusic. Visible; MoveMusicToDocs. Collapsed; MyMusicBlock. Collapsed; MyDocsListBox. Collapsed; MyMusicListBox. Collapsed; MoveDocsToMusic. Collapsed; MoveMusicToDocs. Collapsed; MessageBlock. GetFolderPath Environment. Yes, we have it. Now we can test the File Read operation.

That's it, we have successfully achieved File read and write from Local File System with Elevated trust level. Hope this article helps. View All. Diptimaya Patra Updated date May 10, Next Recommended Reading. Net Core 6. Create A. Understanding Thread Starvation in.