radComboBox and Null values.

I am displaying list of customers in a radComboBox. its value customerID should be saved into a FK_CustomerID column.
It does this propoerly. 

Now when i retrieve the same record , i would like to de-select the customer so that i can set FK_CustomerID to null in database.
but i see that there is no way to deselect the customer to reset FK_CustomerID back to null. 

How do i solve this ?  

Regards

Hi Lee,

You can deselect a selected item in RadComboBox by setting the SelectedIndex property to -1 and clearing the SelectedItems collection if there are multiple selected items.

If this does not help, please explain in more detail what your goal is since I could not fully understand it from the information provided. RadComboBox serves simply as a visualization of data, but it knows nothing about databases, constraints, relations or data tables. Thanks.

I am looking forward to your reply.
 
Sincerely yours,
Victor
the Telerik team