public void RetrieveGroups(string searchTerm)
{
if (repository == null)
{
throw new InvalidOperationException("You must connect to AD before querying the groups.");
}
AreGroupsDisplayed = true;
AreUsersDisplayed = false;
if (tokenSource != null)
{
tokenSource.Cancel();
}
tokenSource = new CancellationTokenSource();
groupTask = groupTask.ContinueWith(
t => { IsSearching = true; },
tokenSource.Token,
TaskContinuationOptions.None,
TaskScheduler.FromCurrentSynchronizationContext()
).ContinueWith(t =>
{
CancellationToken token = tokenSource.Token;
Groups.Clear();
var groups = repository.GetGroups(searchTerm);
var models = groups.Select(g => groupMapper.GetModel(g, includeDummy: true));
var modelComparer = KeyComparer <GroupModel> .OrderBy(m => m.Name);
foreach (var model in models)
{
token.ThrowIfCancellationRequested();
int index = Groups.ToSublist().UpperBound(model, modelComparer);
Groups.Insert(index, model);
}
}, tokenSource.Token);
groupTask.ContinueWith(
t => onErrorOccurred(t.Exception),
CancellationToken.None,
TaskContinuationOptions.OnlyOnFaulted,
TaskScheduler.FromCurrentSynchronizationContext()
);
groupTask.ContinueWith(
t => { IsSearching = false; },
tokenSource.Token,
TaskContinuationOptions.None,
TaskScheduler.FromCurrentSynchronizationContext()
);
}
