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VectorTileDataProviderBase.GetStream(Int64, Int64, Int64) Method

Returns a stream that contains a vector tile with specific coordinates at a specified zoom level.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v21.2.dll

Declaration

public virtual Stream GetStream(
    long x,
    long y,
    long level
)

Parameters

Name Type Description
x Int64

An x-coordinate of a tile in the grid.

y Int64

A y-coordinate of a tile in the grid.

level Int64

A zoom level.

Returns

Type Description
Stream

A stream that contains a tile.

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.

    <dxm:MapControl>
        <dxm:ImageLayer>
            <local:VectorTileProvider/>
        </dxm:ImageLayer>
    </dxm:MapControl>
    
    public class VectorTileProvider : VectorTileDataProviderBase {
        public override Stream GetStream(long x, long y, long level) {
            // Your implementation here.            
        }
    }
    
See Also