WPF中头模板中控件如何访问?
<DataGridTemplateColumn IsReadOnly="False" CanUserResize="False" >
<DataGridTemplateColumn.HeaderTemplate >
<HierarchicalDataTemplate >
<DockPanel HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<CheckBox Name="ckbHeader" HorizontalAlignment="Center" Width="20" Click="ckbHeaderNewBarcod_Click" ></CheckBox>
</DockPanel>
</HierarchicalDataTemplate>
</DataGridTemplateColumn.HeaderTemplate>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<CheckBox HorizontalAlignment="Center" VerticalAlignment="Center" IsChecked="{Binding Path=Selected}" Click="CheckBoxNewBarcode_Click"></CheckBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
如何访问ckbHeader?多谢