WPF Triggering by ancestral property
c#, findancestor, triggers, wpf
Solution
<DataTrigger Binding="{Binding State, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Whatever}}}" Value="Expanded">
Problem
I would like to use a trigger, but need to select the ancestor's property, for example: ``` <Trigger Property="State" Value="Expanded"> <Setter Property="Background" Value="Red" /> </Trigger> ``` Only that the State property need to be the property of an unknown ancestor by a known Type and if could not be found then trigger would never execute. So my question is how can I find the ancestor to get the property to use in the trigger? Hope I made myself clear. Thank you in advance.