private async void Search_Click(object sender, RoutedEventArgs e)
{
StockProgress.Visibility = Visibility.Visible;
StockProgress.IsIndeterminate = true;
Search.Content = "Cancel";
var watch = new Stopwatch();
watch.Start();
if (cancellationTokenSource != null)
{
cancellationTokenSource.Cancel();
cancellationTokenSource = null;
return;
}
cancellationTokenSource = new CancellationTokenSource();
cancellationTokenSource.Token.Register(() =>
{
Notes.Text += "Cancellation requested" + Environment.NewLine;
});
// var symbols = Ticker.Text.Split(' ');
try
{
await Task.Factory.StartNew(() =>
{
var line = File.ReadAllLines(@"CompanyData.csv");
var l = line
.Skip(1)
.Select(l => CompanyData.LineToData(l));
foreach (var d in l)
{
Dispatcher.Invoke(() =>
{
Stocks.Items.Add(d.ToString());
});
}
},
CancellationToken.None,
TaskCreationOptions.DenyChildAttach,
TaskScheduler.Default
);
}
catch (Exception ex)
{
Notes.Text += ex.Message + Environment.NewLine;
}
finally {
cancellationTokenSource = null;
}
watch.Stop();
StocksStatus.Text = $"Loaded date in {watch.ElapsedMilliseconds}ms";
StockProgress.Visibility = Visibility.Hidden;
Search.Content = "Search";
}
public static Task <IEnumerable <CompanyData> > PollThread()
{
var source = new TaskCompletionSource <IEnumerable <CompanyData> >();
ThreadPool.QueueUserWorkItem(_ => {
var line = File.ReadAllLines(@"CompanyData.csv");
var l = line
.Skip(1)
.Select(l => CompanyData.LineToData(l));
source.SetResult(l);
});
return(source.Task);
}
private void NewTask_Click(object sender, RoutedEventArgs e)
{
if (cancellationTokenSource != null)
{
cancellationTokenSource.Cancel();
cancellationTokenSource = null;
return;
}
var loadLinesTask = Task.Run(() =>
{
var lines = File.ReadAllLines(@"CompanyData.csv");
return(lines);
});
loadLinesTask.ContinueWith(t =>
{
var datas = t.Result.Select(l => CompanyData.LineToData(l));
foreach (var data in datas)
{
Dispatcher.Invoke(() =>
{
Stocks.Items.Add(data.ToString());
});
}
}, cancellationTokenSource.Token,
TaskContinuationOptions.OnlyOnRanToCompletion,
TaskScheduler.Current);
loadLinesTask.ContinueWith(t =>
{
Dispatcher.Invoke(() =>
{
Stocks.Items.Add(t.Exception.InnerException.Message);
});
});
}