Can you bind a DataTrigger to an Attached Property?

Question :

Can you bind a DataTrigger to an Attached Property?,

Answer :

In WPF, is it possible for a DataTrigger to bind to an attached property?

I essentially want to use a converter on an attached property to provide a style when a particular validation rule has been broken. I am using markup like the following:

        

However, when this runs, I get the following:

System.Windows.Data Error: 39 :
BindingExpression path error:
‘Validation’ property not found on
‘object’ ”TextBox’ (Name=”)’.
BindingExpression:Path=Validation.Errors;
DataItem=’TextBox’ (Name=”); target
element is ‘TextBox’ (Name=”); target
property is ‘NoTarget’ (type ‘Object’)

If I change my DataTrigger binding path to “Text”, I do not get the databinding error (but of course it does not provide the behaviour I am seeking).

,

You need to wrap the property in parentheses:

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