GridCustomSummaryEventArgs Class

Contains data for the CustomSummary event.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v23.1.dll

NuGet Package: DevExpress.Blazor

Declaration

public class GridCustomSummaryEventArgs

Remarks

Use GridCustomSummaryEventArgs (TotalValue, FieldValue, and so on) to evaluate the summary value and access other grid data.

Run Demo: Grid - Custom Summary

<DxGrid @ref="Grid"
        Data="@Data"
        AllowSelectRowByClick="true"
        SelectedDataItems="@SelectedDataItems"
        SelectedDataItemsChanged="Grid_SelectedDataItemsChanged"
        CustomSummary="Grid_CustomSummary"
        CustomizeSummaryDisplayText="Grid_CustomizeSummaryDisplayText"
        SizeMode="Params.SizeMode" 
        KeyboardNavigationEnabled="Params.KeyboardNavigationEnabled">
    <Columns>
        <DxGridSelectionColumn Width="60px"/>
        <DxGridDataColumn FieldName="CompanyName" MinWidth="100" />
        <DxGridDataColumn FieldName="City" Width="10%" />
        <DxGridDataColumn FieldName="Region" Width="10%" />
        <DxGridDataColumn FieldName="Country" Width="10%" />
        <DxGridDataColumn FieldName="UnitPrice" DisplayFormat="c" Width="10%" />
        <DxGridDataColumn FieldName="Quantity" Width="10%" />
        <DxGridDataColumn FieldName="Total"
                          UnboundType="GridUnboundColumnType.Decimal"
                          UnboundExpression="[UnitPrice] * [Quantity]"
                          DisplayFormat="c"
                          MinWidth="100"
                          Width="15%" />
    </Columns>
    <TotalSummary>
        <DxGridSummaryItem SummaryType="GridSummaryItemType.Custom" Name="Custom" FieldName="Total" />
    </TotalSummary>
</DxGrid>

@code {
@* ... *@
IGrid Grid { get; set; }
@* ... *@
    void Grid_CustomSummary(GridCustomSummaryEventArgs e) {
        switch(e.SummaryStage) {
            case GridCustomSummaryStage.Start:
                e.TotalValue = 0m;
                break;
            case GridCustomSummaryStage.Calculate:
                if(e.Grid.IsDataItemSelected(e.DataItem))
                    e.TotalValue = (decimal)e.TotalValue + (decimal)e.GetRowValue("Total");
                break;
        }
    }
    void Grid_CustomizeSummaryDisplayText(GridCustomizeSummaryDisplayTextEventArgs e) {
        if(e.Item.Name == "Custom")
            e.DisplayText = string.Format("Sum of Selected: {0:c}", e.Value);
    }
    void Grid_SelectedDataItemsChanged() {
        Grid.RefreshSummary();
    }
}

Inheritance

Object

GridCustomSummaryEventArgs