Bind ColumnGroup Text

[Mark]

Using MVVM I have a property to hold the value to be displayed in the ColumnGroup Text property

This fails to display the required text.

<telerik:GridViewColumnGroup  Name="ThisYearA" Header="{Binding Path=DataContext.lThisYearActual, RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type telerik:RadGridView}}}" />

Changing the x:Type to the Page also fails.

I have also bound the text to a hidden textblock, this also fails to display in the ColumnGroup

<telerik:GridViewColumnGroup  Name="ThisYearF" Binding ElementName=txtLastYearActual}" />

The textblock txtLastYearActual correctly displays the content.

 

[Mark]

Resolved using this article 

Artificial Inheritance Contexts in WPF