async Task <StringBuilder> DoWorkAsync(SqlTester data, CancellationToken token)
{
if (token.IsCancellationRequested)
{
return(new StringBuilder("cancelled"));
}
var task = Task.Run(() =>
{
Dispatcher.Invoke(() =>
{
OutputResultControl.AppendText("...working with...." + data.DataBaseType.ToString() + Environment.NewLine);
});
if (token.IsCancellationRequested)
{
return(Task.FromResult(new StringBuilder("cancelled")));
}
return(data.Execute(token));
});
return(await task);
}
private async void Button_Click_1(object sender, RoutedEventArgs e)
{
if (((Button)sender).Content.ToString() == "Cancel")
{
GetCanellationtokenForButton((Button)sender).Cancel();
return;
}
var prev = ((Button)sender).Content;
try
{
OutputResultControl.Text = "starting multipple concurrency test" + Environment.NewLine;
var db_type = SelectedDBaseType;
var tst_type = TestType;
((Button)sender).Content = "Cancel";
int concurrentyCount = ConcurrencyCount.GetValueOrDefault(1);
await Task.Factory.StartNew(() =>
{
try
{
ParallelOptions po = new ParallelOptions();
CancellationToken token = default;
Dispatcher.Invoke(() =>
{
token = GetCanellationtokenForButton((Button)sender).Token;
po.CancellationToken = token;
});
Parallel.For(0, concurrentyCount, po, async(i, pls) =>
{
try
{
var data = new SqlTester(db_type, tst_type);
Dispatcher.Invoke(() =>
{
OutputResultControl.AppendText("starting test #" + i + " with " + data.DataBaseType.ToString() +
Environment.NewLine);
});
var result = await data.Execute(token);
// Display the result. All is ok
Dispatcher.Invoke(() =>
{
OutputResultControl.Text = result.ToString();
});
}
catch (OperationCanceledException)
{
pls.Stop();
Dispatcher.Invoke(() =>
{
OutputResultControl.Text = "cancelled";
});
return;
}
catch (Exception ex)
{
//Show error
Dispatcher.Invoke(() =>
{
OutputResultControl.Text = "Error: " + ex.Message;
});
}
});
}
catch (OperationCanceledException)
{
Dispatcher.Invoke(() =>
{
OutputResultControl.Text = "cancelled";
});
}
finally
{
//All sub-task ended. Notify UI
Dispatcher.Invoke(() =>
{
((Button)sender).Content = prev;
var cts = GetCanellationtokenForButton((Button)sender);
if (cts.IsCancellationRequested)
{
cts.Dispose();
_cancellationTokenSource.Remove(((Button)sender).Name);
}
});
}
});
}
catch (Exception ex)
{
//Show error
OutputResultControl.Text = "Error: " + ex.Message;
}
}