private async void executeAsync_Click(object sender, RoutedEventArgs e)
{
resultsWindow.Text = string.Empty;
resultsWindow.Refresh();
progressBar.Value = 0;
var progress = new Progress <ProgressReportModel>();
progress.ProgressChanged += ReportProgress;
var watch = Stopwatch.StartNew();
try
{
cancellationTokenSource.Dispose();
cancellationTokenSource = new CancellationTokenSource();
var results = await AsyncMethods.RunDownloadAsync(progress, cancellationTokenSource.Token);
}
catch (OperationCanceledException)
{
resultsWindow.Text += $"The async download was cancelled {Environment.NewLine}";
}
watch.Stop();
resultsWindow.Text += $"Total execution time: {watch.ElapsedMilliseconds}";
}
private async void executeAsyncInParallel_Click(object sender, RoutedEventArgs e)
{
resultsWindow.Text = string.Empty;
resultsWindow.Refresh();
progressBar.Value = 0;
var watch = Stopwatch.StartNew();
var results = await AsyncMethods.RunDownloadAsyncInParallel();
ReportResults(results);
watch.Stop();
resultsWindow.Text += $"Total execution time: {watch.ElapsedMilliseconds}";
}
public static async Task <List <WebsiteDataModel> > RunDownloadAsync(IProgress <ProgressReportModel> progress, CancellationToken cancellationToken)
{
var testWebsites = CommonMethods.GetTestWebsites();
var results = new List <WebsiteDataModel>();
var report = new ProgressReportModel();
foreach (var website in testWebsites)
{
// this allows the UI to respond and be moved but the "await" means that it still does each call one after the other
// asynchronous calls made synchronously
var result = await AsyncMethods.DownloadWebsiteAsync(website);
results.Add(result);
cancellationToken.ThrowIfCancellationRequested();
report.WebsitesDownloaded = results;
report.PercentageComplete = (results.Count * 100) / testWebsites.Count;
progress.Report(report);
}
return(results);
}