Hi Lauren Nickerson,
Unfortunately when the TreeView uses an ItemEditTemplate (i.e. it is bound) it will not populate these properties. They contain just the data item that the TreeView is bound to.
We are looking to enable these properties for the Q1 release of the controls when the TreeView is bound.
In the meantime I can suggest storing the value that you need in a field when editing starts and then refering to it if you need to when editing ends.
the Telerik team