private void BeginDownload()
{
using (var storage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (storage.FileExists("/shared/transfers/channel9.mp3"))
{
storage.DeleteFile("/shared/transfers/channel9.mp3");
}
}
_request = new BackgroundTransferRequest(
new Uri("http://media.ch9.ms/ch9/7e13/ce6ea97c-e233-4e7c-a74d-ee1c81e37e13/WP8JumpStart04.mp3",
UriKind.Absolute),
new Uri("/shared/transfers/channel9.mp3", UriKind.Relative))
{
Tag = "Channel9Download", TransferPreferences = TransferPreferences.AllowBattery
};
_monitor = new TransferMonitor(_request);
Control1.DataContext = _monitor;
_monitor.RequestStart(); //This adds request to the BackgroundTransferService queue.
}
private void StartDownload(BackgroundTransferRequest request)
{
if (request.TransferStatus == TransferStatus.Completed)
{
OnCompletion(request);
}
else if (request.TransferStatus == TransferStatus.Unknown)
{
OnFailure(request);
}
else
{
Monitor = new TransferMonitor(request);
Monitor.Complete += (_, args) => { OnCompletion(request); };
Monitor.Failed += (_, args) =>
{
OnFailure(request);
if (args.Request.StatusCode == 206 && args.Request.TotalBytesToReceive > 100000000 && args.Request.TransferPreferences == TransferPreferences.AllowCellularAndBattery)
{
var newRequest = new BackgroundTransferRequest(args.Request.RequestUri, args.Request.DownloadLocation)
{
Tag = args.Request.Tag,
TransferPreferences = TransferPreferences.None,
};
StartDownload(newRequest);
}
};
if (request.TransferStatus == TransferStatus.None)
{
IsolatedStorage.WriteAllText(GetBaseFilename() + CourseTopicNameSuffix, CourseTopicName);
IsolatedStorage.WriteAllText(GetBaseFilename() + LectureTitleSuffix, LectureTitle);
IsolatedStorage.WriteAllText(GetBaseFilename() + IndexSuffix, Index.ToString());
Monitor.RequestStart();
}
}
}