VectorTileDataProviderBase Class

The base class for vector tile data providers.

Assembly: DevExpress.Xpf.Map.v20.1.dll

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

Declaration

C#
VB.NET

public abstract class VectorTileDataProviderBase :
    ImageTileDataProvider,
    IVectorTileStreamProvider

Public MustInherit Class VectorTileDataProviderBase
    Inherits ImageTileDataProvider
    Implements IVectorTileStreamProvider

Remarks

Follow the steps below to implement a provider that loads tiles from a custom source.

Create a provider class that implements VectorTileDataProviderBase.
Implement the VectorTileDataProviderBase.GetStream method so that it returns a tile as a sequence of bytes for specific coordinates in the tile grid at the specified zoom level.

Assign the provider to the ImageLayer.DataProvider property. Note that the ImageLayer.DataProvider is a content property. You can declare a provider in XAML directly after a layer’s declaration without wrapping it in opening and closing ImageLayer.DataProvider tags.

XAML

<dxm:MapControl>
    <dxm:ImageLayer>
        <local:VectorTileProvider/>
    </dxm:ImageLayer>
</dxm:MapControl>

C#
VB.NET

public class VectorTileProvider : VectorTileDataProviderBase {
    public override Stream GetStream(long x, long y, long level) {
        // Your implementation here.            
    }
}

Public Class VectorTileProvider
    Inherits VectorTileDataProviderBase
    Public Overrides Function GetStream(ByVal x As Long, ByVal y As Long, ByVal level As Long) As Stream
        ' Your implementation here.
    End Function
End Class