private async void OnRangesDownloaded(DownloadOperation sender, BackgroundTransferRangesDownloadedEventArgs args)
{
// BackgroundTransfer will wait for the app's RangesDownloaded event handlers to finish executing before
// triggering the next RangesDownloaded event. Any download progress made while the app's handlers are
// executing get coalesced into a single RangesDownloaded event.
//
// When calling async APIs inside this handler, we must first take a deferral and then complete it once we
// are done processing the event. Otherwise, BackgroundTransfer will assume that the handler is done executing
// as soon as the synchronous portion of the handler returns, even if there are still tasks running.
using (args.GetDeferral())
{
// AddedRanges tells you which ranges were downloaded since the last RangesDownloaded event.
// To get the full list of downloaded ranges, use the GetDownloadedRanges method.
string message = " Newly-downloaded ranges: " + FormatDownloadedRanges(args.AddedRanges);
// A download may restart if the server contents changed while the download is in progress.
if (args.WasDownloadRestarted)
{
message += " (download was restarted)";
}
// Wait for the UI update to happen before completing the deferral. That way, we can be certain that
// the next RangesDownloaded event will not get triggered midway through the UI update.
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
DownloadedRangesText.Text = FormatDownloadedRanges(sender.GetDownloadedRanges());
rootPage.NotifyUser(message, NotifyType.StatusMessage);
});
}
}
private void Download_RangesDownloaded(DownloadOperation obj, BackgroundTransferRangesDownloadedEventArgs args)
{
var index = Player.Download.DownloadList.IndexOf(DObject);
Player.Download.DownloadList[index].Downloaded = obj.Progress.BytesReceived;
if (obj.Progress.TotalBytesToReceive != 0)
{
Player.Download.DownloadList[index].FileSize = (long)obj.Progress.TotalBytesToReceive;
Player.Download.DownloadList[index].PercentDownload = obj.Progress.BytesReceived / obj.Progress.TotalBytesToReceive * 100;
}
}
