public static Task<string> DownloadAsync (Update update, IProgress<int> progress)
{
return DownloadAsync (update, progress, CancellationToken.None);
}
public static Task<string> DownloadAsync (Update update, IProgress<int> progress, CancellationToken cancelToken)
{
if (update == null)
throw new ArgumentNullException ("update");
if (progress == null)
throw new ArgumentNullException ("progress");
TaskCompletionSource<string> tcs = new TaskCompletionSource<string>();
string path = Path.Combine (Path.GetTempPath(), "GablarskiUpdate.exe");
WebClient web = new WebClient();
web.DownloadFileCompleted += (sender, args) => {
if (args.Cancelled)
tcs.SetCanceled();
else if (args.Error != null)
tcs.SetException (args.Error);
else
tcs.SetResult (path);
};
web.DownloadProgressChanged += (sender, args) => progress.Report (args.ProgressPercentage);
web.DownloadFileAsync (new Uri (update.InstallerUrl), path);
cancelToken.Register (web.CancelAsync);
return tcs.Task;
}