In addition to displaying summaries/results from aggregates in the group header,
RadGrid exposes group footers feature which provides the option to render footer under each group in the grid.
The type of this footer item is GridGroupFooterItem. To enable
this functionality merely set the ShowGroupFooter property of the
respective GridTableView instance to true (its default value is false).
The group footers are most commonly used to visualize calculations from aggregate functions within
the scope of the current group. Furthermore, with nested groups you will have group
footer for each inner group along with one for the main group. Aggregate calculations
are supported for GridBoundColumns and GridCalculatedColumns.
In order to specify how the group aggregates will be evaluated, specify in every
GridBoundColumn/GridCalculatedColumn the Aggregate property which
accepts values from the GridAggregateFunction enumeration.
RadGrid will calculate aggregates over the entire data source and will respect the
filter expression applied (if present).
For more information refer to the following online help article:
Group footers