private static void Sort(string sortBy, ListSortDirection direction)
{
ListCollectionView view = (ListCollectionView)CollectionViewSource.GetDefaultView(lv.ItemsSource);
if (view != null)
{
try
{
ListViewCustomComparer sorter = (ListViewCustomComparer)ListViewSorter.GetCustomSorter(lv);
if (sorter != null)
{
// measuring timing of custom sort
int tick1 = Environment.TickCount;
sorter.AddSort(sortBy, direction);
view.CustomSort = sorter;
lv.Items.Refresh();
int tick2 = Environment.TickCount;
double elapsed1 = (tick2 - tick1) / 1000.0;
MessageBox.Show(elapsed1.ToString() + " seconds.");
}
else
{
//measuring timem of SortDescriptions sort
int tick3 = Environment.TickCount;
lv.Items.SortDescriptions.Clear();
SortDescription sd = new SortDescription(sortBy, direction);
lv.Items.SortDescriptions.Add(sd);
lv.Items.Refresh();
int tick4 = Environment.TickCount;
double elapsed2 = (tick4 - tick3) / 1000.0;
MessageBox.Show(elapsed2.ToString() + " seconds.");
}
}
catch (Exception ex)
{
string msg = ex.Message;
}
}
}
private static void GridViewColumnHeaderClickedHandler(object sender, RoutedEventArgs e)
{
GridViewColumnHeader headerClicked = e.OriginalSource as GridViewColumnHeader;
ListSortDirection direction;
if (headerClicked != null)
{
if (headerClicked != _lastHeaderClicked)
{
direction = ListSortDirection.Ascending;
}
else
{
if (_lastDirection == ListSortDirection.Ascending)
{
direction = ListSortDirection.Descending;
}
else
{
direction = ListSortDirection.Ascending;
}
}
string header = String.Empty;
try
{
header = ((Binding)ListViewSorter.GetSortBindingMember(headerClicked.Column)).Path.Path;
}
catch (Exception ex)
{
string msg = ex.Message;
}
if (header == String.Empty)
{
return;
}
Sort(header, direction);
string resourceTemplateName = String.Empty;
DataTemplate tmpTemplate;
//if (_lastHeaderClicked != null)
//{
// resourceTemplateName = "HeaderTemplateSortNon";
// tmpTemplate = lv.TryFindResource(resourceTemplateName) as DataTemplate;
// _lastHeaderClicked.Column.HeaderTemplate = tmpTemplate;
//}
switch (direction)
{
case ListSortDirection.Ascending: resourceTemplateName = "HeaderTemplateSortAsc"; break;
case ListSortDirection.Descending: resourceTemplateName = "HeaderTemplateSortDesc"; break;
}
tmpTemplate = lv.TryFindResource(resourceTemplateName) as DataTemplate;
if (tmpTemplate != null)
{
headerClicked.Column.HeaderTemplate = tmpTemplate;
}
_lastHeaderClicked = headerClicked;
_lastDirection = direction;
}
}
