intercept RelativeSource FindAncestor

Posted by Pradeep on Stack Overflow See other posts from Stack Overflow or by Pradeep
Published on 2010-03-08T15:15:20Z Indexed on 2010/04/04 22:43 UTC
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Filed under:

wpf

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wpf-controls

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ribbon-control

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wpf-binding

I have a WPF application which runs as a excel plugin, it has its visual tree like so

Excel
- ElementHost
  - WPF UserControl
    - WPF ribbon bar control

Now any controls sitting on the WPF ribbon bar control are not enabled when the plugin is loaded within excel. See error below

System.Windows.Data Error: 4 : Cannot find source for binding with 
reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Window', AncestorLevel='1''. BindingExpression:Path=IsActive; DataItem=null; target element 
is 'Ribbon' (Name=''); target property is 'NoTarget' (type 'Object')

If I nest the ribbon bar control in a standalone Window(outside excel) it works fine.

Is there a way to intercept the FindAncestor call for a Window and wire it to something else.? Note that I cannot change the above binding as it isn't my control.

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