How to: Sort Groups by Summary Values

• Dec 17, 2020

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:

C#

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);
}

VB.NET

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    grid.GroupSummarySortInfo.Clear()
    Dim sortInfo As ASPxGroupSummarySortInfo = New ASPxGroupSummarySortInfo()
    sortInfo.SortOrder = ColumnSortOrder.Descending
    sortInfo.SummaryItem = grid.GroupSummary("Sales", SummaryItemType.Sum)
    sortInfo.GroupColumn = "Country"
    grid.GroupSummarySortInfo.AddRange(sortInfo)
End Sub

ASPX

<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>