IntervalDateTimeScaleOptions.UnderflowValue Property

Gets or sets the underflow interval’s end value.

Namespace: DevExpress.Xpf.Charts

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

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public DateTime? UnderflowValue { get; set; }

VB.NET

Public Property UnderflowValue As Date?

Property Value

Type	Description
Nullable<DateTime>	The date-time value that specifies the underflow interval’s end value.

Example

This example demonstrates how to create a histogram chart based on date-time values.

Use the following API members to configure histogram options:

Member	Description
IntervalDateTimeScaleOptions	Stores options for the date-time x-axis whose scale is divided into intervals.
ManualDateTimeScaleOptions.AggregateFunction	Gets or sets the function that is used to aggregate date-time axis data when one of the AxisX2D.DateTimeScaleOptions, AxisX3D.DateTimeScaleOptions, or RadarAxisX2D.DateTimeScaleOptions properties is set to ManualDateTimeScaleOptions.
OverflowValue	Gets or sets the overflow interval’s start value.
UnderflowValue	Gets or sets the underflow interval’s end value.
Pattern	Gets or sets a format string that configures text for the axis label and crosshair label.
OverflowValuePattern	Gets or sets a format string that configures text for the overflow interval axis label and crosshair label.
UnderflowValuePattern	Gets or sets a format string that configures text for the underflow interval axis label and crosshair label.

XAML

<dxc:ChartControl x:Name="chartControl" 
                  Width="480" Height="270">
    <dxc:XYDiagram2D>
        <dxc:XYDiagram2D.AxisX>
            <dxc:AxisX2D TickmarksMinorVisible="False" 
                         GridLinesVisible="True">
                <dxc:AxisX2D.DateTimeScaleOptions>
                    <!-- Configure histogram options. -->
                    <dxc:IntervalDateTimeScaleOptions AggregateFunction="Histogram"
                                                      OverflowValue="2019/01/20" 
                                                      UnderflowValue="2019/01/10"                  
                                                      Pattern="{}{A1:MMM dd} - {A2:MMM dd}"
                                                      OverflowValuePattern="After {A1: MMM dd}"
                                                      UnderflowValuePattern="Before {A2: MMM dd}"/>
                    <!--...-->
                </dxc:AxisX2D.DateTimeScaleOptions>
                <dxc:AxisX2D.WholeRange>
                    <dxc:Range SideMarginsValue="0.8" AutoSideMargins="False"/>
                </dxc:AxisX2D.WholeRange>
            </dxc:AxisX2D>
        </dxc:XYDiagram2D.AxisX>
        <dxc:BarSideBySideSeries2D  DisplayName="Series" 
                                    DataSource="{Binding}" 
                                    ArgumentDataMember="Date"
                                    ArgumentScaleType="DateTime"
                                    BarWidth="1">
        </dxc:BarSideBySideSeries2D>
    </dxc:XYDiagram2D>
</dxc:ChartControl>