I have a requirement to display only one detail table at a time so when a user expands a parent item and I have to collapse all open detail tables on the server-side (HierarchyLoadMode = ServerOnDemand ). Ideally, I need to unbound all this data as well.
How to do it?
You can go through the following help link to allow single row expand at a time for each level in the grid hierarchy, which i suppose is your requirement. Single expand in hierarchical grid