private async Task <Uri> HandleDownload(DownloadOperation download, bool alreadyStarted)
{
var bindableDownload = new BindableDownloadOperation(download);
try {
ActiveDownloads.Add(bindableDownload);
var callback = new Progress <DownloadOperation>(OnDownloadStatusUpdate);
IAsyncOperationWithProgress <DownloadOperation, DownloadOperation> op = null;
if (alreadyStarted)
{
var d = download.AttachAsync();
op = download.AttachAsync();
}
else
{
op = download.StartAsync();
}
op.Progress = (a, p) => {
OnBindableStatusUpdate(bindableDownload);
};
// awaits completion of download
DownloadOperation completedDownload = await op.AsTask(Cts.Token, callback);
return(FileUtils.UriFor(completedDownload.ResultFile));
} finally {
// download complete
ActiveDownloads.Remove(bindableDownload);
}
}
private async void OnBindableStatusUpdate(BindableDownloadOperation download)
{
await download.UpdateProgress();
}