SvgFileDataAdapter Class

A data adapter that loads data from SVG files, and displays it on vector layers.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v20.2.dll

NuGet Packages: DevExpress.WindowsDesktop.Wpf.Map, DevExpress.Wpf.Map

Declaration

C#

public class SvgFileDataAdapter :
    CoordinateSystemDataAdapterBase,
    ISvgPointConverterFactory

VB.NET

Public Class SvgFileDataAdapter
    Inherits CoordinateSystemDataAdapterBase
    Implements ISvgPointConverterFactory

Remarks

SVG is a two-dimensional vector graphic format that uses an XML-based text format to describe images.

The image below shows a vector map loaded from an SVG file.

The following table lists supported SVG elements and related map items:

SVG element	Map item
<circle>	MapEllipse
<ellipse>	MapEllipse
<line>	MapLine
<path> (M,m,L,l,H,h,V,v,Z,z commands are supported)	MapPath
<polyline>	MapPolyline
<polygon>	MapPolygon
<rect>	MapRectangle

Note

The Map Control does not support the style element and style tag in the SVG markup.

Load Data

Follow the steps below to load data from an SVG file:

• Create a new SvgFileDataAdapter object.
• Use the SvgFileDataAdapter.FileUri property to specify the path to an SVG file.
• Assign the adapter to the VectorLayer.Data property.

View Example

XAML

<dxm:MapControl>
    <dxm:VectorLayer>
        <dxm:SvgFileDataAdapter FileUri="Data/countries.svg" />
    </dxm:VectorLayer>
</dxm:MapControl>

Access and Customize Map Items

When vector items are loaded, the MapGeoDataAdapter.ShapesLoaded event occurs. Use the e.Shapes property to access loaded shapes.

XAML

<dxm:MapControl>
 <dxm:VectorLayer>
     <dxm:SvgFileDataAdapter FileUri="Data/countries.svg" ShapesLoaded="SvgFileDataAdapter_ShapesLoaded" />
 </dxm:VectorLayer>
</dxm:MapControl> 

C#

private void SvgFileDataAdapter_ShapesLoaded(object sender, DevExpress.Xpf.Map.ShapesLoadedEventArgs e) {
  foreach (MapPath item in e.Shapes) {
      item.Fill = Brushes.Gray;
  }
}

VB.NET

Private Sub SvgFileDataAdapter_ShapesLoaded(ByVal sender As Object, ByVal e As DevExpress.Xpf.Map.ShapesLoadedEventArgs)
    For Each item As MapPath In e.Shapes
        item.Fill = Brushes.Gray
    Next
End Sub

Use the MapControl.ZoomToFitLayerItems method to zoom a map to fit layer items.

XAML

<dxm:MapControl x:Name="mapControl">
 <dxm:VectorLayer x:Name="vectorLayer" DataLoaded="VectorLayer_DataLoaded" >
     <dxm:SvgFileDataAdapter FileUri="Data/countries.svg" />
 </dxm:VectorLayer>
</dxm:MapControl> 

C#

 private void VectorLayer_DataLoaded(object sender, DataLoadedEventArgs e) {
  mapControl.ZoomToFitLayerItems(new LayerBase[] { vectorLayer });
}

VB.NET

Private Sub VectorLayer_DataLoaded(ByVal sender As Object, ByVal e As DataLoadedEventArgs)
    mapControl.ZoomToFitLayerItems(New LayerBase() {vectorLayer})
End Sub

You can change shape colors based on shape data. Refer to the following help topic for more information: Colorizers.

You can also group items of the same type. To do this, initialize the MapDataAdapterBase.Clusterer property with a clusterer.

Inheritance

Object

DispatcherObject

DependencyObject

Freezable

MapDependencyObject

MapDataAdapterBase

CoordinateSystemDataAdapterBase

SvgFileDataAdapter