(学)Telerik GridFoot 如何加合计

                   <telerik:GridViewDataColumn Header="姓名" UniqueName="EMPLOYEENAME" MinWidth="120" >
                        <telerik:GridViewDataColumn.AggregateFunctions>
                            <telerik:AverageFunction Caption="" ResultFormatString="{}{0:#.000}" />
                        </telerik:GridViewDataColumn.AggregateFunctions>
                    </telerik:GridViewDataColumn>