Thanks Christian, Here is how my ItemProperty is defined: <xcdg:DataGridItemProperty Name=''Status'' ValuePath=''InactivatedDate'' DataType=''{x:Type system:String}'' Converter=''{StaticResource ActiveStatusConverter}''/> I am bound to a ReadOnlyCollection.  I will try using an ObservableColleciton and let you know how I make ...

I have a grid with an unbound column that uses a value converter.  The value converter checks the passed in value to see if it is null and then returns ''Active'' if it is and ''Inactive'' if it isn't.  (it's a deactivated date) Everything works great and the autofilter shows up with two choices in it.  Active and Inactive.  I ...