Get storagefolder from path

Question

Hello,

i picked a folder using folderpicker and i need a subfolder or same folder by it's path is it possible with GetFolderFromPathAsync method ? when i using this method it through a exception 

 StorageFolder fo = null;
        private async void Pick_Click(object sender, RoutedEventArgs e)
        {
            FolderPicker fp = new FolderPicker();
            fp.SuggestedStartLocation = PickerLocationId.ComputerFolder;
            fp.FileTypeFilter.Add("*");
            StorageFolder folder = await fp.PickSingleFolderAsync();
            
            fo = await StorageFolder.GetFolderFromPathAsync(folder.Path);
        }

exception

An exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll but was not handled in user code

WinRT information: Cannot access the specified file or folder (D:\Test\New folder). The item is not in a location that the application has access to (including application data folders, folders that are accessible via capabilities, and persisted items in the StorageApplicationPermissions lists). Verify that the file is not marked with system or hidden file attributes.

Please Help me...

---

Santana George

Answer 1

why open it again this way?

but if you really want you will have to cache the acces with:http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.accesscache.aspx

Answer 2

As described in the error text, you can only call GetFolderFromPathAsync for paths that the app can access natively. Your app cannot read d:\test, so it cannot directly access the folder.

Since you already have the folder returned from the picker why do you need to reopen it by path? Also consider that not all folders are backed by the file system and may not have a path at all.

As Dave (and the error) says, if the goal is to be able to open the same folder at some later date then you can cache access with the AccessCache namespace. See the File picker sample and File access sample for examples.

--Rob