Hello Oliver,

Thank you for the feedback. I am glad that you have found a solution to your issue.

Got it:

<infr:FieldLayoutSettings SortEvaluationMode="Manual" />

protected override void OnSorting(SortingEventArgs e)
{
ICollectionView iCollectionView = (ICollectionView)DataSource;
iCollectionView.SortDescriptions.Clear();

ListSortDirection direction = ListSortDirection.Descending;

string sortedInfo = e.Field.Name;

if (string.Equals(sortedInfo, "MySpecialColumn"))
{
if (e.SortDescription.Direction == ListSortDirection.Descending)
{
direction = ListSortDirection.Ascending;
}
}
else
{
direction = e.SortDescription.Direction;
}

iCollectionView.SortDescriptions.Add(new SortDescription(sortedInfo, direction));
}

Hi Gergana,

I tried to overwrite the OnSorting Event but it doesn't change anything. Can you fix it?

protected override void OnSorting(SortingEventArgs e)
{
string sortedInfo = e.Field.Name;

if (string.Equals(sortedInfo, "IsInvalid"))
{
if (e.SortDescription.Direction == ListSortDirection.Ascending)
{
ICollectionView iCollectionView = (ICollectionView)DataSource;
iCollectionView.SortDescriptions.Clear();
iCollectionView.SortDescriptions.Add(
new SortDescription(sortedInfo, ListSortDirection.Descending));
}
else
{
ICollectionView iCollectionView = (ICollectionView) DataSource;
iCollectionView.SortDescriptions.Clear();
iCollectionView.SortDescriptions.Add(
new SortDescription(sortedInfo, ListSortDirection.Ascending));
}
}
else
{
base.OnSorting(e);
}
}