This feature of RadGrid gives you the freedom to design the overall structure and
appearance of detail tables in hierarchical grid. Thus based on your custom preferences
you have the ability model the look and feel of the child table container in order
to display the detail info in non table-dependant format. The functionality
is especially useful when you would like to present the related content providing
separate view for each detail item or tabs for navigation between the entries.
The detail table template should be specified between the NestedViewTemplate tags
of its parent GridTableView. The template will appear when you expand the respective
parent item. Keep in mind that it is up to you to decide how to define the relation
between the parent and child data in order to filter the data visualized in the
detail template. Also note that when you set NestedView template at a given level
the regular detail tables definitions you may at the same level will be disregarded.
Review this topic from the online documentation for further details:
NestedView template