/// <summary>
/// Handles the Click event of the ColumnHeader control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.RoutedEventArgs" /> instance containing the event data.</param>
private static void ColumnHeader_Click(object sender, RoutedEventArgs e)
{
GridViewColumnHeader columnHeader = e.OriginalSource as GridViewColumnHeader;
if (columnHeader != null)
{
ListView listView = sender as ListView;
if (listView != null)
{
string propertyName;
// Determine the binding to use for the sorting.
Binding binding = columnHeader.Column.DisplayMemberBinding as Binding;
if (binding == null || binding.Path == null)
{
propertyName = GetPropertyName(columnHeader.Column);
}
else
{
propertyName = binding.Path.Path;
}
// Apply the sorting for the given property.
if (string.IsNullOrEmpty(propertyName))
{
return;
}
// Determine the direction of the sorting.
ListSortDirection direction = GetSortingDirection(columnHeader);
// The use of the comparer is much faster than using the sort descriptions.
IListViewComparer comparer = GetSortComparer(listView);
if (comparer != null)
{
// Update the properties.
comparer.PropertyName = propertyName;
comparer.Direction = direction;
// Apply the comparison.
ListCollectionView collectionView = (ListCollectionView)CollectionViewSource.GetDefaultView(listView.ItemsSource);
collectionView.CustomSort = comparer;
}
else if (!propertyName.Contains("."))
{
listView.Items.SortDescriptions.Clear();
listView.Items.SortDescriptions.Add(new SortDescription(propertyName, direction));
}
// Update the sort adorner.
UpdateAdorner(columnHeader, direction);
}
}
}
/// <summary>
/// Sets the sort comparer.
/// </summary>
/// <param name="o">The o.</param>
/// <param name="value">The value.</param>
public static void SetSortComparer(DependencyObject o, IListViewComparer value)
{
o.SetValue(SortComparerProperty, value);
}
