MapPieMappingInfo.SegmentId Property

Gets or sets the data field to which the PieSegment.SegmentId property is bound.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v18.2.dll

Declaration

C#

public string SegmentId { get; set; }

VB.NET

Public Property SegmentId As String

Property Value

Type	Description
String	A String value.

Example

To automatically generate pie chart items from a datasource do the following.

1. Create a PieChartDataAdapter object and assign it to the VectorLayer.Data property.
2. Bind a data source to the DataSourceAdapterBase.DataSource property of the object.
3. Specify mappings to assign data fields to pie segment properties. To do this, specify the MapItemMappingInfoBase.Latitude, MapItemMappingInfoBase.Longitude, MapPieMappingInfo.SegmentValue and MapPieMappingInfo.SegmentId properties of the MapPieMappingInfo object assigned to the PieChartDataAdapter.Mappings property.
4. Specify the ChartDataSourceAdapter.ItemIdDataMember property to group generated pie segments to pie charts.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/wpf-mapcontrol-getting-started-lesson-3-add-analytical-data-to-a-geographical-map-t177876.

MainWindow.xaml

<dxm:VectorLayer.Data>
    <dxm:PieChartDataAdapter DataSource="{Binding Source={StaticResource dataProvider}, XPath=Table1}" 
                             ItemIdDataMember="Country" ItemMinSize="20" ItemMaxSize="60">
        <dxm:PieChartDataAdapter.MeasureRules>
            <dxm:MeasureRules RangeStops="1 10 20 30 40"/>
        </dxm:PieChartDataAdapter.MeasureRules>
        <dxm:PieChartDataAdapter.AttributeMappings>
            <dxm:MapItemAttributeMapping Member="Name" Name="Name"/>
        </dxm:PieChartDataAdapter.AttributeMappings>
        <dxm:PieChartDataAdapter.Mappings>
            <dxm:MapPieMappingInfo Latitude="CapitalLat" Longitude="CapitalLon" 
                                   SegmentId="MedalClass" SegmentValue="Quantity"/>
        </dxm:PieChartDataAdapter.Mappings>
    </dxm:PieChartDataAdapter>
</dxm:VectorLayer.Data>

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the SegmentId property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

customize-appearance-of-generated-pie-chart-items-t183429/VB/Wpf_MapControl_PieChartDataAdapter/MainWindow.xaml#L57

    <dxm:MapPieMappingInfo Latitude="CapitalLat" Longitude="CapitalLon"
                           SegmentId="MedalClass" SegmentValue="Quantity"/>
</dxm:PieChartDataAdapter.Mappings>

wpf-mapcontrol-getting-started-lesson-3-add-analytical-data-to-a-geographical-map-t177876/VB/Wpf_MapControl_Lesson3/MainWindow.xaml#L40

    <dxm:MapPieMappingInfo Latitude="CapitalLat" Longitude="CapitalLon"
                           SegmentId="MedalClass" SegmentValue="Quantity"/>
</dxm:PieChartDataAdapter.Mappings>

how-to-customize-the-appearance-of-automatically-generated-map-pie-charts-t212908/VB/MapPieSettingsExample/MainWindow.xaml#L63

    <dxm:MapPieMappingInfo Latitude="CapitalLat" Longitude="CapitalLon"
                           SegmentId="MedalClass" SegmentValue="Quantity"/>
</dxm:PieChartDataAdapter.Mappings>