c# - BackgroundDownloader.GetCurrentDownloadsAsync returns completed downloads

Question

In my windows store app I am using BackgroundDownloader class to handle multiple background downloads. After all my 3 downloads are 100% complete, I close and open application, then when I run BackgroundDownloader.GetCurrentDownloadsAsync, it returns all downloads with 100% completed state.

IReadOnlyList<DownloadOperation> readOnlyList = await BackgroundDownloader.GetCurrentDownloadsAsync();

My expectation is completed downloads will be removed from list or somehow I need to force-remove them. But could not find any function for it.

How can I remove completed downloads from CurrentDownloads list?

-Side question: Will GetCurrentDownloadsAsync function return all active downloads (including other applications downloads) or only downloads are performing in my application?

Answer 1

You have to execute the completion handler by doing AttachAsync() on the downloads that just completed. After that, downloads will not appear anymore in the results of GetCurrentDownloadsAsync().

Try:

private async void Foo()
{
    var downloads = await BackgroundDownloader.GetCurrentDownloadsAsync();
    foreach (var download in downloads)
    {
        var task = download.AttachAsync().AsTask();
        var notAwait = task.ContinueWith(OnCompleted);
    }
}

private void OnCompleted(Task<DownloadOperation> task)
{
    DownloadOperation download = task.Result;
    // ...
}