TreeListView.CustomSummary Event
Enables you to calculate summary values manually.
Namespace: DevExpress.Xpf.Grid
Assembly: DevExpress.Xpf.Grid.v18.2.dll
Declaration
Event Data
The CustomSummary event's data class is TreeListCustomSummaryEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| FieldValue | Gets the processed field value. |
| IsNodeSummary | Gets whether the processed row values are used to calculate a node summary. |
| IsTotalSummary | Gets whether the processed row values are used to calculate a total summary. |
| IsTotalValueReady | Gets or sets whether the Calculation stage of the custom summary calculation process should be skipped. |
| Node | Gets the processed node. |
| SummaryItem | Gets a summary item whose value is being calculated. |
| SummaryProcess | Gets a value indicating the calculation stage. |
| TotalValue | Gets or sets the total summary value. |
Remarks
Total summaries provides five predefined aggregate functions (COUNT, MAX, MIN, SUM and AVG). If you want to calculate summaries using custom rules, handle the CustomSummary event. This event enables you to implement custom aggregate functions or calculate summary values, using a custom algorithm.
To learn more, see Custom Summary.
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the CustomSummary event.
Note
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