Hello
Harri,
The
DataFormatString which you have specified is not valid. A possible workaround for this issue, is to use to edit the
CellTemplate of the
GridViewMaskedInputColumn. In it you can declare a
TextBlock element and bind it's Text property to your
IBAN property and specify a converter that will return the string that should be displayed.
I attached an updated version of my previous project, that demonstrates the suggested approach.
I hope this helps.
Regards,
Boris Penev
Telerik
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