private void EnumerateFiles()
{
var dp = (Path as DirectoryInfoEx);
if (!_isEnumerationRequired)
{
return;
}
_isEnumerationRequired = false;
Children.Clear();
if (dp == null)
{
return;
}
Children.AddRange(from fsi in dp.GetFileSystemInfos()
where _filterAction == null || (!fsi.IsFolder && !(FileExtensionFilter.Contains(fsi.FullName.GetExt()) ^ (bool)_filterAction)) || fsi.IsFolder
select new FileTreeViewModel(this, fsi)
{
_isChecked = _isChecked == true, FileExtensionFilter = FileExtensionFilter, _filterAction = _filterAction
});
OnPropertyChanged("IsThreeState");
}
public void Refresh()
{
if (_isEnumerationRequired)
{
return;
}
var dp = (Path as DirectoryInfoEx);
if (dp == null)
{
return;
}
Children = Children.Intersect(from fsi in dp.GetFileSystemInfos()
where _filterAction == null || (!fsi.IsFolder && !(FileExtensionFilter.Contains(fsi.FullName.GetExt()) ^ (bool)_filterAction)) || fsi.IsFolder
select new FileTreeViewModel(this, fsi)
{
_isChecked = _isChecked == true, FileExtensionFilter = FileExtensionFilter, _filterAction = _filterAction
}).ToList();
Children.ForEach(m => m.Refresh());
if (IsChecked != null)
{
SetIsChecked(IsChecked, true, false, true);
}
else
{
VerifyCheckState();
}
}