Question

I have a wpf application that displays a ‘Node’ as such:

<TreeView HorizontalAlignment="Stretch" Name="treeView1" VerticalAlignment="Stretch" Width="Auto" Margin="6,6,6,35">
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate DataType="{x:Type local:Node}" ItemsSource="{Binding Children}">
            <CheckBox HorizontalAlignment="Center" VerticalAlignment="Center" IsThreeState="{Binding HasChildren}" IsChecked="{Binding IsChecked, Mode=TwoWay}" Content="{Binding Text}" Click="RefreshTree" />
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

I would like to do the following:

private void RefreshTree(object sender, RoutedEventArgs e)
{
    Node leaf = sender as Node;

    // Do stuff with leaf
}

This fails to cast, as object is of type Controls.CheckBox. Is there a way to get the sender of the event as my underlying template type (Node)?

Many thanks!

Answer 1

Your Node will be available as the DataContext, like so:

var checkBox = sender as CheckBox;
var node = checkBox.DataContext as Node;

That’s what the Bindings in your XAML are using also.