ParallelWPFProgress

ParallelWPFProfress.cs

private async void btnWordStatsParallelInTaskWithProgress_Click(object sender, RoutedEventArgs e)
{
    txbResultsInfo.Text = "";
 
    IProgress<string> progress = new Progress<string>(message =>
    {
        txbResultsInfo.Text += message;
    });

    await Task.Run(() => Parallel.ForEach(_files, (file) =>
    {
        Dictionary<string, int> stats = new Dictionary<string, int>();

        foreach (var word in File.ReadAllLines(file.FullName))
        {
            if (stats.ContainsKey(word))
                stats[word]++;
            else
                stats.Add(word, 1);
        }

        progress.Report(file.Name + Environment.NewLine +
                        string.Join(Environment.NewLine, stats.OrderByDescending(x => x.Value).Take(10)
                                        .Select(x => x.Key + ": " + x.Value))
                        + Environment.NewLine + Environment.NewLine);

    }));

    txbResultsInfo.Text += "Elapsed ms: " + w.ElapsedMilliseconds;
}