This sample demonstrates aggregate functionality of the TreeGrid. In this sample, the aggregate value for the column "Approved" is displayed in column footer and provide an option to show child summary.
| Show Child Summary |
The TreeGrid supports aggregates which will be displayed at the footer and every hierarchy level. The aggregate configurations can be provided by the aggregates property. The built-in aggregates are
SumAverageMinMaxCountTrueCountFalseCountCustom - Requires the customAggregate property to perform aggregation.
The custom aggregate value can be accessed inside template using the key ${custom}
In this demo, the footerTemplate property is used for showing count aggregate for "Approved" column and the footerTemplate using its type name as (${TrueCount}).
The template expression should be provided inside ${...} the interpolation syntax.
More information on the data binding can be found in this documentation section.