is usually used when the values from one field (the one that DisplayMember
points to) of the data source need to be formatted. The same format string is applied on all items in the combobox, so it is not possible to combine values from two fields, the way you need. Since your case is not possible at the moment, we're going to implement a Format
event that could be used for similar purposes. It will probably be available in the next release of our controls (Q2 2007).
the Telerik team