How to: Sort Groups by Summary Values

This example sorts group rows by summary values, so that countries that have the highest sales appear at the top of the view.

The image below shows the result:

exGroupSummarySort

using DevExpress.Data;
using DevExpress.Web.ASPxGridView;

protected void Page_Load(object sender, EventArgs e) {
    grid.GroupSummarySortInfo.Clear();

    ASPxGroupSummarySortInfo sortInfo = new ASPxGroupSummarySortInfo();
    sortInfo.SortOrder = ColumnSortOrder.Descending;
    sortInfo.SummaryItem = grid.GroupSummary["Sales", SummaryItemType.Sum];
    sortInfo.GroupColumn = "Country";

    grid.GroupSummarySortInfo.AddRange(sortInfo);
}
<dxwgv:ASPxGridView ID="grid" ClientInstanceName="grid" runat="server" DataSourceID="AccessDataSource1" KeyFieldName="OrderID" Width="100%">
    <Columns>
        <dxwgv:GridViewDataColumn FieldName="CompanyName" VisibleIndex="2" />            
        <dxwgv:GridViewDataColumn FieldName="City" VisibleIndex="3" />
        <dxwgv:GridViewDataColumn FieldName="Region" VisibleIndex="4" />            
        <dxwgv:GridViewDataColumn FieldName="Country" GroupIndex="0" VisibleIndex="5" />            
        <dxwgv:GridViewDataColumn FieldName="Sales" VisibleIndex="6" />            
    </Columns>
    <GroupSummary>
        <dxwgv:ASPxSummaryItem FieldName="Sales" SummaryType="Sum" DisplayFormat="{0:c}"/>
    </GroupSummary>
</dxwgv:ASPxGridView>