private void DataGridStandardSorting(object sender, DataGridSortingEventArgs e)
{
string sortPropertyName = SortHelpers.GetSortMemberPath(e.Column);
if (!string.IsNullOrEmpty(sortPropertyName))
{
// sorting is cleared when the previous state is Descending
if (e.Column.SortDirection.HasValue && e.Column.SortDirection.Value == ListSortDirection.Descending)
{
int index = SortHelpers.FindSortDescription(Items.SortDescriptions, sortPropertyName);
if (index != -1)
{
e.Column.SortDirection = null;
// remove the sort description
Items.SortDescriptions.RemoveAt(index);
Items.Refresh();
if ((Keyboard.Modifiers & ModifierKeys.Shift) != ModifierKeys.Shift)
{
// clear any other sort descriptions for the multisorting case
Items.SortDescriptions.Clear();
Items.Refresh();
}
// stop the default sort
e.Handled = true;
}
}
}
}