Events Overview
RadDropDownTree control introduces the following server-side events for working with menu entries:
NodeDataBound - Occurs when the nodes in the tree in the dropdown are bound.
EntryAdded - Occurs when an entry is added. The postback is triggered when the dropdown is closed. To close the dropdown when a node is selected, you can set DropDownSettings-CloseDropDownOnSelection="true".
EntryRemoved - Occurs when an entry is removed. The postback is triggered when the dropdown is closed. To close the dropdown when a node is selected, you can set DropDownSettings-CloseDropDownOnSelection="true".