groupAggregate Field

The groupAggregate event handler is a function that is called when groups are being created and the column object's aggregate option has been set to "custom". This event is useful when you want to calculate custom aggregate values.

Syntax

Javascript (Usage)
Javascript (Specification)

var instance; // Type: wijmo.grid.IDetailSettings;
var value; // Type: any
value = instance.groupAggregate;

var groupAggregate : any;

Example

Javascript

// This sample demonstrates using the groupAggregate event handler to calculate an average in a custom aggregate:
$("#element").wijgrid({
    groupAggregate: function (e, args) {
        if (args.column.dataKey == "Price") {
            var aggregate = 0;
            for (var i = args.groupingStart; i <= args.groupingEnd; i++) {
                aggregate += args.data[i].valueCell(args.column.dataIndex).value;
            }
            aggregate = aggregate/ (args.groupingEnd - args.groupingStart + 1);
            args.text = aggregate;
        }
    }
});

Remarks

You can bind to the event either by type or by name. Bind to the event by name: $("#element").wijgrid({ groupAggregate: function (e, args) { // some code here }}); Bind to the event by type: $("#element").bind("wijgridgroupaggregate", function (e, args) { // some code here });

Reference

IDetailSettings Interface