IntervalNumericScaleOptions.UnderflowValuePattern Property

Gets or sets a format string that configures text for the underflow interval axis labels and crosshair labels.

Namespace: DevExpress.Xpf.Charts

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

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public string UnderflowValuePattern { get; set; }

VB.NET

Public Property UnderflowValuePattern As String

Property Value

Type	Description
String	A format string.

Remarks

Patterns can contain regular text (displayed as is) and value placeholders in braces. To format numeric and date/time values, you can apply Format Specifiers. Use a colon to separate a placeholder and its format specifier.

The following table contains the available placeholders:

Placeholder	Description
{OB}	Displays an opening bracket.
{CB}	Displays a closing bracket.
{OS}	Displays the greater than sign.
{US}	Displays the less than or less than or equal to sign.
{A1}	Displays the interval start value.
{A2}	Displays the interval end value.

Example

This example demonstrates how to create a histogram chart with bins of a given width.

The code below configures a histogram for a chart with a numeric x-axis scale.

XAML

<dxc:ChartControl x:Name="chartControl">
    <dxc:XYDiagram2D>
        <dxc:XYDiagram2D.AxisX>
            <dxc:AxisX2D TickmarksMinorVisible="False" 
                         GridLinesVisible="True">
                <dxc:AxisX2D.NumericScaleOptions>
                    <!-- Configure a histogram with the specified number of bins. -->
                    <dxc:WidthIntervalNumericScaleOptions AggregateFunction="Histogram" 
                                                          Width="10"
                                                          OverflowValue="20"
                                                          UnderflowValue="-30"
                                                          GridLayoutMode="GridAndLabelCentered"
                                                          Pattern="{}{OB}{A1:F0}; {A2:F0}{CB}"
                                                          OverflowValuePattern="{}{OS} {A1:F0}"
                                                          UnderflowValuePattern="{}{US} {A2:F0}"/>
                    <!--...-->                                                                  
                </dxc:AxisX2D.NumericScaleOptions>
                <dxc:AxisX2D.WholeRange>
                    <dxc:Range SideMarginsValue="0.8"/>
                </dxc:AxisX2D.WholeRange>
                <dxc:AxisX2D.Title>
                    <dxc:AxisTitle Content="Temperature (°C)" FontSize="14" Margin="0" Padding="0"/>
                </dxc:AxisX2D.Title>
            </dxc:AxisX2D>
        </dxc:XYDiagram2D.AxisX>
        <dxc:BarSideBySideSeries2D  DisplayName="Temperature" 
                                    DataSource="{Binding}" 
                                    ArgumentDataMember="Temperature" 
                                    BarWidth="1">
        </dxc:BarSideBySideSeries2D>
    </dxc:XYDiagram2D>
</dxc:ChartControl>

The following API members configure the histogram options:

Member	Description
WidthIntervalNumericScaleOptions	The options that provide means to create axis intervals with a specified width.
ManualNumericScaleOptions.AggregateFunction	Gets or sets the function that is used to aggregate numeric axis data when one of the AxisX2D.NumericScaleOptions, AxisX3D.NumericScaleOptions, or CircularAxisX2D.NumericScaleOptions properties is set to ManualNumericScaleOptions.
WidthIntervalNumericScaleOptions.Width	Gets or sets the interval width in x-axis measurement units.
IntervalNumericScaleOptions.OverflowValue	Gets or sets the start value for the interval that includes overflow values.
IntervalNumericScaleOptions.UnderflowValue	Gets or sets the end value for the interval that includes underflow values.
IntervalNumericScaleOptions.GridLayoutMode	Gets or sets the value that specifies the alignment of grid lines, major tickmarks and axis labels.
IntervalNumericScaleOptions.Pattern	Gets or sets a format string that configures text for the interval axis labels and crosshair labels.
IntervalNumericScaleOptions.OverflowValuePattern	Gets or sets a format string that configures text for the overflow interval axis labels and crosshair labels.
IntervalNumericScaleOptions.UnderflowValuePattern	Gets or sets a format string that configures text for the underflow interval axis labels and crosshair labels.