Retrieving a parent group

The following example demonstrates how to retrieve the parent group of the current item using the GetParentGroupFromItem method so that it can be collapsed. The implementation for the CollapseCurrentGroup method is provided below.

XAML

  <Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
    <Grid.Resources>
      <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                      Source="{Binding Source={x:Static Application.Current},
                                                        Path=Orders}">
        <xcdg:DataGridCollectionViewSource.GroupDescriptions>
          <xcdg:DataGridGroupDescription PropertyName="ShipCountry"/>
          <xcdg:DataGridGroupDescription PropertyName="ShipCity"/>
        </xcdg:DataGridCollectionViewSource.GroupDescriptions>
      </xcdg:DataGridCollectionViewSource>
    </Grid.Resources>
    <DockPanel>
      <Button Content="Collapse Group"
              Click="CollapseCurrentGroup"
              DockPanel.Dock="Top"/>
      <xcdg:DataGridControl x:Name="OrdersGrid"
                            ItemsSource="{Binding Source={StaticResource cvs_orders}}"
                            DockPanel.Dock="Bottom"/>
    </DockPanel>
  </Grid>

C#

private void CollapseCurrentGroup( object sender, RoutedEventArgs e )
{
  DataGridContext context = this.OrdersGrid.CurrentContext;
  CollectionViewGroup group = context.GetParentGroupFromItem( context.CurrentItem );
  context.CollapseGroup( group );
}

VB.NET

  Private Sub CollapseCurrentGroup( ByVal sender As Object, ByVal e As RoutedEventArgs )
    Dim context As DataGridContext = Me.OrdersGrid.CurrentContext
    Dim group As CollectionViewGroup = context.GetParentGroupFromItem( context.CurrentItem )
    context.CollapseGroup( group )
  End Sub