To get the group summary's display text the GetGroupSummaryDisplayText method can be used.
Refer to the Working with Summaries in Code. Custom Summaries document for more information on how summary values can be accessed.
Note
Detail pattern Views do not contain data and they are never displayed within XtraGrid. So, the GetGroupSummaryValue member must not be invoked for these Views.
The GetGroupSummaryValue member can only be used with real Views that are displayed within the Grid Control. The real Views with which an end-user interacts at runtime can be accessed using the following methods.