Use GroupHeaderTemplate to customize group header rows.
In this demo the grid is pre-grouped by Customer (descending), the GroupHeaderTemplate displays the group key, item count, and last order date, and a tri-state checkbox controls GroupRowRender to expand/collapse all groups at once.
# | Order IDfilter_alt | Freightfilter_alt | Order Datefilter_alt | Ship Namefilter_alt | Employeefilter_alt |
|---|---|---|---|---|---|
| No records to display. | |||||
| Displayed orders: 0 of 0 | Total amount: $0.00 | Last order date: | |||
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