Range.StartSideMargin Property

Gets or sets the distance between the series point with the lowest value and the start of the axis range.

Namespace: DevExpress.Xpf.Charts

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

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public double StartSideMargin { get; set; }

VB.NET

Public Property StartSideMargin As Double

Property Value

Type	Description
Double	The side margin value. SideMarginSizeUnit specifies the unit.

Remarks

Use an instance of the Range class to access the StartSideMargin property. To specify the margin on the opposite side, use EndSideMargin. Set the Range.SideMarginsValue property to define both side margins.

Specify Margins in Axis Units

The following images show a chart with different StartSideMargin values (the x-axis measurement unit is Day):

Property Value	Example
StartSideMargin = 20 (Days) (SideMarginSizeUnit = SideMarginSizeUnit.AxisUnit)
StartSideMargin = 0 (Days) (SideMarginSizeUnit = SideMarginSizeUnit.AxisUnit)

Markup:

XAML

<dxc:ChartControl ... >
    <dxc:XYDiagram2D>
        <dxc:XYDiagram2D.AxisX>
            <dxc:AxisX2D ...>
                <dxc:AxisX2D.WholeRange>
                    <dxc:Range StartSideMargin="20" 
                               SideMarginSizeUnit="AxisUnit"/>
                </dxc:AxisX2D.WholeRange>
            </dxc:AxisX2D>
        </dxc:XYDiagram2D.AxisX>
    </dxc:XYDiagram2D>
    ...
</dxc:ChartControl>

At runtime:

C#

Range range = new Range();
xAxis.WholeRange = range;
range.SideMarginSizeUnit = SideMarginSizeUnit.AxisUnit;
range.StartSideMargin = 20;

VB.NET

Dim range As Range = New Range()
xAxis.WholeRange = range
range.SideMarginSizeUnit = SideMarginSizeUnit.AxisUnit
range.StartSideMargin = 20

Note: If you set StartSideMargin or EndSideMargin, the control ignores the Range.AutoSideMargins property.

When the SideMarginSizeUnit property is set to AxisUnit, side margins are specified in axis measurement units.

These axis measurement units vary according to the axis type.

Axis Type	Axis Mode	Default Measurement Unit
Date-time	Continuous	DateTimeMeasureUnit.Millisecond
Date-time	Manual, Interval	DateTimeMeasureUnit.Day
Time-span	Continuous	TimeSpanMeasureUnit.Millisecond
Time-span	Manual, Interval	TimeSpanMeasureUnit.Second
Numerical	Continuous, Manual, Interval	Ones
Qualitative		Ones

In Automatic mode, the Chart Control determines an axis measurement unit based on underlying data.

Specify Margins as a Percentage

Set the Range.SideMarginSizeUnit property to SideMarginSizeUnit.AxisRangePercentage to define a margin value as a percentage of the axis range, for example:

Markup:

XAML

<dxc:ChartControl ... >
    <dxc:XYDiagram2D>
        <dxc:XYDiagram2D.AxisX>
            <dxc:AxisX2D ...>
                <dxc:AxisX2D.WholeRange>
                    <dxc:Range StartSideMargin="20" 
                               SideMarginSizeUnit="AxisRangePercentage"/>
                </dxc:AxisX2D.WholeRange>
            </dxc:AxisX2D>
        </dxc:XYDiagram2D.AxisX>
    </dxc:XYDiagram2D>
    ...
</dxc:ChartControl>

At runtime:

C#

Range range = new Range();
xAxis.WholeRange = range;
range.SideMarginSizeUnit = SideMarginSizeUnit.AxisRangePercentage;
range.StartSideMargin = 20;

VB.NET

Dim range As Range = New Range()
xAxis.WholeRange = range
range.SideMarginSizeUnit = SideMarginSizeUnit.AxisRangePercentage
range.StartSideMargin = 20

Reversed Axis Margins

If the Axis2D.Reverse property is enabled (axis values are arranged in reversed order), side margins change their positions. As a result, the start margin is displayed at the right (for an x-axis) or top (for a y-axis) of the diagram.