You should configure your detail view as described in the Master-Detail: DataTable Use help topic. Take note of the 5th point: "Specify and Customize Views To Represent Datatables ".
Create an unbound column for the detail view, and subscribe to the CustomUnboundColumnData event of the detail view. Handle this event as described in the following topic:
ColumnView.CustomUnboundColumnData Event
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Specify an unbound column in detail view
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