IndicatorPoint.GetNumericValue(IndicatorValueLevel) Method

Returns the indicator point’s value for the specified indicator value level.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v24.1.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public double? GetNumericValue(
    IndicatorValueLevel valueLevel
)

VB.NET

Public Function GetNumericValue(
    valueLevel As IndicatorValueLevel
) As Double?

Parameters

Name	Type	Description
valueLevel	IndicatorValueLevel	The indicator level.

Returns

Type	Description
Nullable<Double>	The value for the specified indicator line.

Example

This example shows how to modify the Crosshair Cursor indicator elements’ appearance using the CustomDrawCrosshair event.

In this sample, crosshair content is displayed in a legend. For this, set the ContentShowMode property to Legend. Note that you can specify the crosshair’s content show mode for a specified indicator using the CrosshairContentShowMode property.

Use the IndicatorLegendElements property to obtain a collection of indicator elements.

The following properties allow you to modify indicator element appearance:

Property	Description
IndicatorPoint	Returns information about an indicator point under a crosshair.
CrosshairLegendElementBase.LineElement	Returns the crosshair line settings.
CrosshairLegendElementBase.AxisLabelElement	Returns the crosshair axis label settings.

XAML

<dxc:ChartControl x:Name="chartControl" 
                  CustomDrawCrosshair="chartControl_CustomDrawCrosshair">
    <dxc:ChartControl.CrosshairOptions>
        <dxc:CrosshairOptions ShowOnlyInFocusedPane="False" 
                              ShowValueLine="True"
                              ShowValueLabels="True"
                              ContentShowMode="Legend"/>
    </dxc:ChartControl.CrosshairOptions>
    <!--...-->
</dxc:ChartControl>    

C#

private void chartControl_CustomDrawCrosshair(object sender, CustomDrawCrosshairEventArgs e) {
    Brush brush = new SolidColorBrush(Colors.Green);
    foreach(CrosshairIndicatorLegendElement indicatorLegendElement in e.IndicatorLegendElements) {
        if(indicatorLegendElement.IndicatorPoint.GetNumericValue(IndicatorValueLevel.Value) > 0) {
            indicatorLegendElement.LineElement.Brush = brush;            
            indicatorLegendElement.LineElement.LineStyle.DashStyle = new DashStyle(new double[] {5, 2}, 2);
            indicatorLegendElement.AxisLabelElement.Background = brush;
        }
    }
}

VB.NET

Private Sub chartControl_CustomDrawCrosshair(ByVal sender As Object, ByVal e As CustomDrawCrosshairEventArgs)
    Dim brush As Brush = New SolidColorBrush(Colors.Green)

    For Each indicatorLegendElement As CrosshairIndicatorLegendElement In e.IndicatorLegendElements

        If indicatorLegendElement.IndicatorPoint.GetNumericValue(IndicatorValueLevel.Value) > 0 Then
            indicatorLegendElement.LineElement.Brush = brush
            indicatorLegendElement.LineElement.LineStyle.DashStyle = New DashStyle(New Double() {5, 2}, 2)
            indicatorLegendElement.AxisLabelElement.Background = brush
        End If
    Next
End Sub