/// <summary>
/// handles an item being deleted.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Item_Deleted(object sender, DirectoryItemDeletedEventArgs e)
{
// unregister the item.
var currentMode = _visitMode;
_visitMode = VisitMode.Unregister;
e.DeletedItem.Accept(this);
_visitMode = currentMode;
OnRaiseItemDeleted(e);
}
protected virtual void OnRaiseItemDeleted(DirectoryItemDeletedEventArgs args)
{
// Only raise the event if the item/s matches watch pattern.
var matches = GetMatchingFilters(args.DeletedItem.Path).ToArray();
if (matches.Length > 0)
{
var watcherArgs = new DirectoryWatcherFilterMatchedEventArgs <DirectoryItemDeletedEventArgs>(args, matches);
EventHandler <DirectoryWatcherFilterMatchedEventArgs <DirectoryItemDeletedEventArgs> > handler = ItemDeleted;
handler?.Invoke(this, watcherArgs);
}
;
}
protected virtual void OnRaiseItemDeleted()
{
// Make a temporary copy of the event to avoid possibility of
// a race condition if the last subscriber unsubscribes
// immediately after the null check and before the event is raised.
EventHandler <DirectoryItemDeletedEventArgs> handler = Deleted;
// Event will be null if there are no subscribers
if (handler != null)
{
var args = new DirectoryItemDeletedEventArgs(this);
// Use the () operator to raise the event.
handler(this, args);
}
}
