public async Task ExecuteTasksAsync(object sender, EventArgs e, CancellationToken cancellationToken, AspNetSynchronizationContextBase syncContext, IRequestCompletedNotifier requestCompletedNotifier)
{
try {
while (_registeredTasks.Count > 0)
{
// if canceled, propagate exception to caller and stop executing tasks
cancellationToken.ThrowIfCancellationRequested();
// if request finished, stop executing tasks
if (requestCompletedNotifier.IsRequestCompleted)
{
return;
}
// execute this task
IPageAsyncTask task = _registeredTasks.Dequeue();
using (syncContext.AllowVoidAsyncOperationsBlock()) {
await task.ExecuteAsync(sender, e, cancellationToken);
}
}
}
finally {
_executeTasksAsyncHasCompleted = true;
}
}
public void EnqueueTask(IPageAsyncTask task) {
if (_executeTasksAsyncHasCompleted) {
// don't allow multiple calls to the execution routine
throw new InvalidOperationException(SR.GetString(SR.PageAsyncManager_CannotEnqueue));
}
_registeredTasks.Enqueue(task);
}
public void EnqueueTask(IPageAsyncTask task)
{
if (_executeTasksAsyncHasCompleted)
{
// don't allow multiple calls to the execution routine
throw new InvalidOperationException(SR.GetString(SR.PageAsyncManager_CannotEnqueue));
}
_registeredTasks.Enqueue(task);
}
