private void ImageDownloaders_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
switch (e.PropertyName)
{
case "DownloadingProgress":
//long pre_calc_max = MaximumProgressBar == -1 ? 1 : MaximumProgressBar;
double scale = MaximumProgressBar == 0 ? 1 : (MaximumProgressBar / 100);
TotalDownloadingProgress.TotalDownloadingProgressValue = ImageDownloaders.Sum(x => x.CurrentBytesReceived) / scale;
RaisePropertyChanged(nameof(TotalDownloadingProgress));
break;
}
}
public async Task DownloadAllAsync()
{
ImageDownloaders.Where(x => x.TotalBytesToReceive == 0).AsParallel().ForAll(x => x.TotalBytesToReceive = GetTotalBytesReceive(x?.Url));
ImageDownloaders.AsParallel().ForAll(x => x.DownloadingState = DownloadingState.Downloading);
List <Task> tasks = new List <Task>();
foreach (var vm in ImageDownloaders)
{
tasks.Add(vm.StartDownloadAsync("All"));
}
await Task.WhenAll(tasks);
ImageDownloaders.AsParallel().ForAll(x => x.DownloadingState = DownloadingState.Completed);
}
