ChartSeriesSettings<T, TGroupKey, TValue, TArgument>.GroupKey Property

A value of a data source field that is used to group data.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v21.1.dll

Declaration

public TGroupKey GroupKey { get; set; }

Property Value

Type Description
TGroupKey

An object of the NameField field’s data type that specifies the group value.

Remarks

The SeriesTemplate property allows you to specify a template for a Chart series. The property gets an object of the ChartSeriesSettings<T, TGroupKey, TValue, TArgument> type that contains information about the rendered series. To access this object, use the template’s context parameter.

Assign the obtained context to the Settings property to provide the rendered series with the series settings. The context.GroupKey property allows you to group Chart data by an individual data source value. The data source field whose values are used to group data is specified by the NameField property.

<DxChart Data="@GridData">
    <DxChartTitle Text="Sales amount" />
    <DxChartCommonSeries
            SummaryMethod="Enumerable.Sum"
            NameField="@((SaleInfo s) => s.Date.Year)" 
            ArgumentField="@((SaleInfo s) => s.City)" 
            ValueField="@((SaleInfo s) => s.Amount)">
        <SeriesTemplate Context="settings">
            @if(settings.GroupKey == 2015) {
                <DxChartLineSeries Name="Last year" Settings="@settings">
                </DxChartLineSeries>
            } else {
                <DxChartBarSeries Settings="@settings">
                    <DxChartSeriesLabel Visible="true"></DxChartSeriesLabel>
                </DxChartBarSeries>
            }
        </SeriesTemplate>
    </DxChartCommonSeries>
</DxChart>

Chart Series Template

Run Demo: Charts - Dynamic Series

See Also