private async Task ReloadFolderAsync(string path, CancellationToken cancellationToken)
{
//currentPath = path;
folderQuery.ApplyNewQueryOptions(folderQueryOptions);
fileQuery.ApplyNewQueryOptions(fileQueryOptions);
Clear();
await LoadFoldersAsync(cancellationToken);
await LoadFilesAsync(cancellationToken);
s.Stop();
Debug.WriteLine("Load took: " + s.ElapsedMilliseconds + "ms");
}
private async void FileContentsChanged(IStorageQueryResultBase sender, object args)
{
if (_filesRefreshing)
{
Debug.WriteLine("Filesystem change event fired but refresh is already running");
return;
}
else
{
Debug.WriteLine("Filesystem change event fired. Refreshing...");
}
_filesRefreshing = true;
//query options have to be reapplied otherwise old results are returned
_fileQueryResult.ApplyNewQueryOptions(_options);
_folderQueryResult.ApplyNewQueryOptions(_options);
var fileCount = await _fileQueryResult.GetItemCountAsync();
var folderCount = await _folderQueryResult.GetItemCountAsync();
var files = await _fileQueryResult.GetFilesAsync();
var folders = await _folderQueryResult.GetFoldersAsync();
var cancellationTokenSourceCopy = _cancellationTokenSource;
// modifying a file also results in a new unique FolderRelativeId so no need to check for DateModified explicitly
var addedFiles = files.Select(f => f.FolderRelativeId).Except(_filesAndFolders.Select(f => f.FolderRelativeId));
var addedFolders = folders.Select(f => f.FolderRelativeId).Except(_filesAndFolders.Select(f => f.FolderRelativeId));
var removedFilesAndFolders = _filesAndFolders
.Select(f => f.FolderRelativeId)
.Except(files.Select(f => f.FolderRelativeId))
.Except(folders.Select(f => f.FolderRelativeId))
.ToArray();
foreach (var file in addedFiles)
{
var toAdd = files.First(f => f.FolderRelativeId == file);
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
async() =>
{
await AddFile(toAdd, _pageName, cancellationTokenSourceCopy.Token);
});
}
foreach (var folder in addedFolders)
{
var toAdd = folders.First(f => f.FolderRelativeId == folder);
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
async() =>
{
await AddFolder(toAdd, _pageName, cancellationTokenSourceCopy.Token);
});
}
foreach (var item in removedFilesAndFolders)
{
var toRemove = _filesAndFolders.First(f => f.FolderRelativeId == item);
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
RemoveFileOrFolder(toRemove);
});
}
_filesRefreshing = false;
Debug.WriteLine("Filesystem refresh complete");
}