CrosshairAxisLabelOptions.Pattern Property

Gets or sets a string which represents the pattern specifying the text to be displayed within the crosshair axis label that appears for a series point.

Namespace: DevExpress.Xpf.Charts

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

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public string Pattern { get; set; }

VB.NET

Public Property Pattern As String

Property Value

Type	Description
String	A String that is the crosshair axis label pattern. The default value is Empty.

Property Paths

You can access this nested property as listed below:

Object Type	Path to Pattern
Axis2D	.CrosshairAxisLabelOptions .Pattern
Axis3DBase	.CrosshairAxisLabelOptions .Pattern

Remarks

You can use either the {A} pattern for the X-axis, or the {V} pattern for the Y-axis, together with the format specifiers.

For example, the table below shows {V:F0} and {V:F4} patterns that are used to format crosshair value labels.

Pattern= {V:F0}	Pattern= {V:F4}

The table below demonstrates the {A:F0} and {A:F4} patterns that format crosshair argument labels.

Pattern= {A:F0}	Pattern= {A:F4}

Note

When you format crosshair axis labels, they can demand more space on a diagram to display the whole axis value. To extend the space for a crosshair axis label, the AxisLabel.BeginText property should contain empty spaces that correspond the required area for the crosshair axis labels.

You can use standard and custom format specifics, together with the placeholders to format numeric and date/time values (e.g., {V:F0}). To learn more, see the Format Specifiers topic.

For more information on how to use a crosshair cursor, refer to the Tooltip and Crosshair Cursor topic.

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>

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Pattern property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

XAML

wpf-charts-custom-draw-crosshair-cursor/CS/CrosshairCustomDraw/MainWindow.xaml#L20

<dxc:AxisX2D.CrosshairAxisLabelOptions>
    <dxc:CrosshairAxisLabelOptions Pattern="{}{V:f1}"/>
</dxc:AxisX2D.CrosshairAxisLabelOptions>

wpf-chart-format-values-in-a-crosshair-cursor-via-a-labels-patterns/CS/UsingCrosshairLabelPattern/MainWindow.xaml#L22

<dxc:AxisX2D.CrosshairAxisLabelOptions>
    <dxc:CrosshairAxisLabelOptions Pattern="Year: {A:F0}" />
</dxc:AxisX2D.CrosshairAxisLabelOptions>