MeasureRules Class
Contains measure rules for vector items.
Namespace: DevExpress.Xpf.Map
Assembly: DevExpress.Xpf.Map.v18.2.dll
Declaration
public class MeasureRules :
MapDependencyObject,
IOwnedElement,
IWeakEventListener,
IMeasureRules,
ILegendDataProvider
Related API Members
The following members return MeasureRules objects:
Remarks
An instance of the MeasureRules class can be accessed using the ChartDataSourceAdapter.MeasureRules property.
Example
To automatically generate pie chart items from a datasource do the following.
- Create a PieChartDataAdapter object and assign it to the VectorLayer.Data property.
- Bind a data source to the DataSourceAdapterBase.DataSource property of the object.
- 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.
- 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.
<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 MeasureRules class.
Note
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