CustomSummaryEventArgs.IsTotalSummary Property

Gets whether a total summary value is being calculated.

Namespace: DevExpress.Maui.DataGrid

Assembly: DevExpress.Maui.DataGrid.dll

NuGet Package: DevExpress.Maui.DataGrid

Declaration

public bool IsTotalSummary { get; }

Property Value

Type	Description
Boolean	true if a total summary value is being calculated; otherwise, false.

Example

This example uses predefined aggregate functions and custom rule to calculate group and total summaries for grid columns.

• Set the group summary to display the maximum Total value for each group of records.
• Set the total summary to calculate the sum of values in the Total column.
• Set the custom total summary to count the number of orders whose value in the Shipped column is false (to count orders that have not shipped).

XAML

<dxg:DataGridView x:Name="grid" ItemsSource="{Binding Orders}" 
                 CustomSummary="OnCalculateCustomSummary">
    <!-- ... -->
    <dxg:DataGridView.GroupSummaries>
        <dxg:GridColumnSummary FieldName="Total" Type="Max"/>
    </dxg:DataGridView.GroupSummaries>

    <dxg:DataGridView.TotalSummaries>
        <dxg:GridColumnSummary FieldName="Total" Type="Sum" 
                               DisplayFormat="Total: {0:C0}"/>
        <dxg:GridColumnSummary FieldName="Shipped" Type="Custom" 
                               DisplayFormat="Not Shipped: {0}"/>
    </dxg:DataGridView.TotalSummaries>
</dxg:DataGridView>

C#

int count;
// ...

private void grid_CustomSummary(object sender, DevExpress.Maui.DataGrid.CustomSummaryEventArgs e) {
    if (e.FieldName.ToString() == "Shipped")
        if (e.IsTotalSummary) {
            if (e.SummaryProcess == DevExpress.Maui.Core.DataSummaryProcess.Start) {
                count = 0;
            }
            if (e.SummaryProcess == DevExpress.Maui.Core.DataSummaryProcess.Calculate) {
                if (!(bool)e.Value)
                    count++;
                e.TotalValue = count;
            }
        }
}