VectorTileDataProviderBase Class

The base class for vector tile data providers.

Assembly: DevExpress.XtraMap.v20.1.dll

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.

C#
VB.NET

using DevExpress.XtraMap;
using System;
using System.IO;
using System.Windows.Forms;
//...
private void Form1_Load(object sender, EventArgs e) {
    ImageLayer layer = new ImageLayer();
    VectorTileProvider dataProvider = new VectorTileProvider();
    layer.DataProvider = dataProvider;
    mapControl1.Layers.Add(layer);
}
public class VectorTileProvider : VectorTileDataProviderBase {
    public override Stream GetStream(long x, long y, long level) {
        // Your implementation here.
    }
}

Imports DevExpress.XtraMap
Imports System
Imports System.IO
Imports System.Windows.Forms
'...
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
    Dim layer As ImageLayer = New ImageLayer()
    Dim dataProvider As VectorTileProvider = New VectorTileProvider()
    layer.DataProvider = dataProvider
    mapControl1.Layers.Add(layer)
End Sub
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