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.v23.2.dll

NuGet Package: DevExpress.Wpf.Map

Declaration

C#

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

VB.NET

Public Overridable Function GetStream(
    x As Long,
    y As Long,
    level As Long
) As Stream

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.

  XAML

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

  C#

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

  VB.NET

  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