Update progress bar from Task.Run async

Question

I have a method to generate software activation key from User Information:

private async void GenerateAsync()
        {
            await Task.Run(() =>
              


        

Answer 1

You should use the more modern IProgress<T>/Progress<T> types:

var progress = new Progress<int>(value => { progressBar.Value = value; });
await Task.Run(() => GenerateAsync(progress));

void GenerateAsync(IProgress<int> progress)
{
  ...
  progress?.Report(13);
  ...
}

This is better than Invoke because it doesn't tie your business logic (GenerateAsync) to a particular UI, or to any UI at all.

Answer 2

I use this method in Winforms:

progressBar1.Invoke((Action)(() => progressBar1.Value=50))