CrosshairOptions.GroupHeaderPattern Property

Gets or sets a string which represents the pattern specifying the group header text to be displayed within the crosshair label.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v23.2.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public string GroupHeaderPattern { get; set; }

VB.NET

Public Property GroupHeaderPattern As String

Property Value

Type	Description
String	A String, which represents the group header’s pattern.

Property Paths

You can access this nested property as listed below:

Object Type	Path to GroupHeaderPattern
ChartControl	.CrosshairOptions .GroupHeaderPattern

Remarks

The group header’s pattern only allows you to specify a string in addition to either the “{A}” placeholder for the CrosshairOptions.SnapMode property is set to NearestArgument or the “{V}” placeholder for the NearestValue snap mode.

Note

A crosshair group header is not displayed on the crosshair label when the CrosshairOptions.CrosshairLabelMode property is set either to CrosshairLabelMode.ShowForEachSeries or CrosshairLabelMode.ShowForNearestSeries modes.

The following image shows this property in action with the “Year: {A}” pattern.

For more information, see the Tooltip and Crosshair Cursor topic.

In addition, you can specify a pattern using the Pattern Editor (the editor is invoked by clicking the ellipsis button of the GroupHeaderPattern property in the Properties window of the Chart Designer).

Example

This example demonstrates how to change the text displayed in crosshair labels.

To do this, use the CrosshairAxisLabelOptions.Pattern, XYSeries2D.CrosshairLabelPattern, and CrosshairOptions.GroupHeaderPattern properties.

In addition, standard and custom format specifiers are used together with the placeholders to format numeric and date/time values (e.g., {A:F0}). To learn more, see the Format Specifiers topic.

See the Crosshair Cursor topic to learn more on a crosshair cursor.

View Example

MainWindow.xaml

<Window x:Class="UsingCrosshairLabelPattern.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxc:ChartControl>
            <!--region #GroupHeaderPattern-->
            <dxc:ChartControl.CrosshairOptions>
                <dxc:CrosshairOptions  GroupHeaderPattern="Year: {A}" 
                                       ShowArgumentLabels="True" ShowArgumentLine="True" 
                                       ShowValueLabels="True" ShowValueLine="True">
                </dxc:CrosshairOptions>
            </dxc:ChartControl.CrosshairOptions>
            <!--endregion #GroupHeaderPattern-->
            <dxc:ChartControl.Diagram>
                <dxc:XYDiagram2D>
                    <!--region #CrosshairAxisLabelPattern-->
                    <dxc:XYDiagram2D.AxisX>
                        <dxc:AxisX2D>
                            <dxc:AxisX2D.CrosshairAxisLabelOptions>
                                <dxc:CrosshairAxisLabelOptions Pattern="Year: {A:F0}" />
                            </dxc:AxisX2D.CrosshairAxisLabelOptions>
                        </dxc:AxisX2D>
                    </dxc:XYDiagram2D.AxisX>
                    <!--endregion #CrosshairAxisLabelPattern-->

                    <!--region #CrosshairLabelPattern-->
                    <dxc:XYDiagram2D.Series>
                        <dxc:LineSeries2D DisplayName="Europe" 
                                          CrosshairLabelPattern="{}{S} population: {V}">
                            <dxc:LineSeries2D.Points>
                                <dxc:SeriesPoint Argument="1950" Value="546" />
                                <dxc:SeriesPoint Argument="1960" Value="605" />
                                <dxc:SeriesPoint Argument="1970" Value="656" />
                                <dxc:SeriesPoint Argument="1980" Value="694" />
                                <dxc:SeriesPoint Argument="1990" Value="721" />
                                <dxc:SeriesPoint Argument="2000" Value="730" />
                                <dxc:SeriesPoint Argument="2010" Value="728" />
                                <dxc:SeriesPoint Argument="2020" Value="721" />
                                <dxc:SeriesPoint Argument="2030" Value="704" />
                                <dxc:SeriesPoint Argument="2040" Value="680" />
                                <dxc:SeriesPoint Argument="2050" Value="650" />
                            </dxc:LineSeries2D.Points>
                        </dxc:LineSeries2D>
                        <dxc:LineSeries2D  DisplayName="Americas" 
                                           CrosshairLabelPattern="{}{S} population: {V} ">
                            <dxc:LineSeries2D.Points>
                                <dxc:SeriesPoint Argument="1950" Value="332" />
                                <dxc:SeriesPoint Argument="1960" Value="417" />
                                <dxc:SeriesPoint Argument="1970" Value="513" />
                                <dxc:SeriesPoint Argument="1980" Value="614" />
                                <dxc:SeriesPoint Argument="1990" Value="721" />
                                <dxc:SeriesPoint Argument="2000" Value="836" />
                                <dxc:SeriesPoint Argument="2010" Value="935" />
                                <dxc:SeriesPoint Argument="2020" Value="1027" />
                                <dxc:SeriesPoint Argument="2030" Value="1110" />
                                <dxc:SeriesPoint Argument="2040" Value="1178" />
                                <dxc:SeriesPoint Argument="2050" Value="1231" />
                            </dxc:LineSeries2D.Points>
                        </dxc:LineSeries2D>
                    </dxc:XYDiagram2D.Series>
                    <!--endregion #CrosshairLabelPattern-->
                </dxc:XYDiagram2D>
            </dxc:ChartControl.Diagram>
        </dxc:ChartControl>
    </Grid>
</Window>