public AsyncTaskWatcher(Task <TResult> task, PostCompletionMethod postMethod)
{
Task = task;
if (!task.IsCompleted)
{
var x = WatchTaskAsync(task, postMethod);
}
}
public async Task WatchTaskAsync(Task task, PostCompletionMethod postMethod)
{
try
{
await task;
}
catch
{
// I want to capture any exceptions and set properties so that the error handling is done further up the stack
}
if (postMethod != null && task.IsCompleted)
{
log.Debug("Post completion method started");
postMethod();
log.Debug("Post completion method finished");
}
var propertyChanged = PropertyChanged;
if (propertyChanged == null)
{
return;
}
propertyChanged(this, new PropertyChangedEventArgs("Status"));
propertyChanged(this, new PropertyChangedEventArgs("IsBusy"));
propertyChanged(this, new PropertyChangedEventArgs("IsNotCompleted"));
if (task.IsCanceled)
{
log.Debug("Task cancelled");
propertyChanged(this, new PropertyChangedEventArgs("IsCanceled"));
}
else if (task.IsFaulted)
{
log.Debug("Task faulted");
propertyChanged(this, new PropertyChangedEventArgs("IsFaulted"));
propertyChanged(this, new PropertyChangedEventArgs("Exception"));
propertyChanged(this, new PropertyChangedEventArgs("InnerException"));
propertyChanged(this, new PropertyChangedEventArgs("ErrorMessage"));
}
else
{
log.Debug("Task completed successfully");
propertyChanged(this, new PropertyChangedEventArgs("IsSuccessfullyCompleted"));
propertyChanged(this, new PropertyChangedEventArgs("Result"));
}
}
