IntervalDateTimeScaleOptions.UnderflowValue Property

Gets or sets the underflow interval’s end value.

Assembly : DevExpress.Xpf.Charts.v25.2.dll

NuGet Package : DevExpress.Wpf.Charts

Declaration

C#
VB.NET

csharp

public DateTime? UnderflowValue { get; set; }

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

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>