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ChartCalculatedField.FieldName Property

Gets or sets the calculated field's name.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v20.1.dll

Declaration

public string FieldName { get; set; }
Public Property FieldName As String

Property Value

Type Description
String

The calculated field's unique name.

Remarks

Use the FieldName property to specify the calculated field's unique name. Avoid dots in names because the Chart uses dots to access data source members. Use the name to specify series data members (for example, Series.ArgumentDataMember, Series.ValueDataMember, Series.ToolTipHintDataMember, or Series.ColorDataMember). You can also use calculated field names to configure text patterns (for example, XYSeries2D.CrosshairLabelPattern.

Examples

The following example shows how to create a calculated field and then use this field as a data source for a series. The field's values are calculated by the following expression: [Time.Seconds] * [Velocity].

<dxc:ChartControl x:Name="chartControl">
    <dxc:ChartControl.DataContext>
        <local:ChartViewModel/>
    </dxc:ChartControl.DataContext>
    <dxc:ChartControl.CalculatedFields>
        <dxc:ChartCalculatedField FieldName="Displacement" 
                                  Expression="[Time.Seconds] * [Velocity]" 
                                  FieldType="Double"/>
    </dxc:ChartControl.CalculatedFields>
    <dxc:XYDiagram2D>
        <dxc:SplineSeries2D DisplayName="Series" 
                            DataSource="{Binding DataPoints}"
                            ArgumentDataMember="Time"
                            ValueDataMember="Displacement" 
                            CrosshairLabelPattern="{}{Displacement:f1}" 
                            MarkerVisible="True"/>
        ...
    </dxc:XYDiagram2D>
</dxc:ChartControl>
See Also