Hi Herta,
Thanks for your interest in Syncfusion Products.
We have modified the sample with the code you provided and found working. Here it has been attached for your reference.
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=GDBG_Pk_Fk-589013590.zipThe column displays the DisplayMember set by default. If there is no display member for a particular item, then ValueMember get displayed for that one. With the code provided, 1 is set with Name1. If the field holds other than 1, but no corresponding values, then corresponding ValueMember will be displayed.
Please let me know if you have any further concerns.
Regards,
Arulraj.A