private static void InitializeSortDirection(ListView listView)
{
#region Guards
var dataSource = listView.ItemsSource;
if (dataSource == null)
return;
var dataview = CollectionViewSource.GetDefaultView(dataSource);
if (dataview == null || dataview.SortDescriptions.Count == 0)
return;
SortInfo sortInfo = listView.GetValue(SortInfoProperty.DependencyProperty) as SortInfo;
if (sortInfo != null)
return;
#endregion
foreach (var columnHeader in listView.FindChildren<GridViewColumnHeader>(h => h.Role != GridViewColumnHeaderRole.Padding))
{
if (columnHeader.Column != null && dataview.SortDescriptions.Count > 0 &&
dataview.SortDescriptions[0].PropertyName.Equals(GetSortField(columnHeader.Column)))
{
sortInfo = new SortInfo();
sortInfo.LastSortColumn = columnHeader;
sortInfo.CurrentAdorner = new VisualAdorner(columnHeader, new ListSortDecorator());
AdornerLayer.GetAdornerLayer(columnHeader).Add(sortInfo.CurrentAdorner);
listView.SetValue(SortInfoProperty, sortInfo);
break;
}
}
}
