private async Task Run(TaskAction taskAction)
{
using (_taskAction = taskAction)
{
try
{
WaitingFor = $"Waiting for '{_taskAction.Name}'...";
Progress = -1;
IsBusy = true;
_events.PublishOnUIThread(TaskState.Started);
await _taskAction.Run(new Progress<int>(p => Progress = p));
_events.PublishOnUIThread(TaskState.Completed);
}
catch (OperationCanceledException)
{
_events.PublishOnUIThread(TaskState.Canceled);
}
catch (Exception ex)
{
_events.PublishOnUIThread(TaskState.Faulted);
var msg = new TaskExceptionMessage(_taskAction.Name, ex);
_events.PublishOnUIThread(msg);
if (!msg.Handled)
throw;
}
finally
{
IsBusy = false;
}
}
}
public void Handle(TaskExceptionMessage message)
{
Trace.TraceError("Could not execute '{0}': {1}", message.TaskName, message.Exception);
MessageBox.Show($"Could not execute '{message.TaskName}': {message.Exception.Message}",
"Error", MessageBoxButton.OK, MessageBoxImage.Error);
}