ScaleLabelOptions.FormatString Property

Gets or sets a value that specifies the format string for the display text on a scale.

Namespace: DevExpress.Xpf.Gauges

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

NuGet Package: DevExpress.Wpf.Gauges

Declaration

C#

public string FormatString { get; set; }

VB.NET

Public Property FormatString As String

Property Value

Type	Description
String	A String value that is the format string of a label.

Remarks

Use the FormatString property to define the specific string format for the scale’s label.

The following images illustrate some of string formats for the Circular Scale:

{0:0}	{0:f1}	{0:c1}

Patterns can comprise plain text and a placeholder {0} with format specifiers. Use a colon to separate a placeholder and its format specifier.

In XAML, insert an escape sequence {} into the beginning of a pattern if it starts with the placeholder. For example: {}{0:0}.

Example

This example shows how to change the arc scale label format and behavior:

Use the following API members to customize labels:

Member	Description
ArcScale.LabelOptions	Gets or sets the options that specify the position and format for labels displayed on the scale.
ArcScaleLabelOptions	Contains appearance and behavior options for arc scale labels.
ArcScaleLabelOptions.Orientation	Provides different types of orientation for labels on the Circular scale.
ScaleLabelOptions.FormatString	Gets or sets a value that specifies the format string for the display text on a scale.

The markup below configures a gauge that replicates the gauge appearance in the image above:

XAML

<Window x:Class="DXGauges_Circular.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxga="http://schemas.devexpress.com/winfx/2008/xaml/gauges"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxga:CircularGaugeControl Name="circularGaugeControl" 
                                   Margin="10">
            <dxga:CircularGaugeControl.Scales>
                <dxga:ArcScale StartValue="0" EndValue="12" 
                               StartAngle="-90" EndAngle="270"
                               MajorIntervalCount="12" MinorIntervalCount="5">
                    <dxga:ArcScale.LabelOptions>
                        <dxga:ArcScaleLabelOptions Orientation="LeftToRight"
                                                   FormatString="{}{0:f1}" 
                                                   ShowFirst="False"/>
                    </dxga:ArcScale.LabelOptions>
                    <dxga:ArcScale.Needles>
                        <dxga:ArcScaleNeedle Value="3">
                            <dxga:ArcScaleNeedle.Options>
                                <dxga:ArcScaleNeedleOptions EndOffset="65"/>
                            </dxga:ArcScaleNeedle.Options>
                        </dxga:ArcScaleNeedle>
                    </dxga:ArcScale.Needles>
                    <dxga:ArcScale.Layers>
                        <dxga:ArcScaleLayer/>
                    </dxga:ArcScale.Layers>
                </dxga:ArcScale>
            </dxga:CircularGaugeControl.Scales>
        </dxga:CircularGaugeControl>
    </Grid>
</Window>