VectorTileDataProviderBase Class

The base class for vector tile data providers.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v25.1.dll

NuGet Package: DevExpress.Win.Map

Declaration

C#

public abstract class VectorTileDataProviderBase :
    ImageTileDataProvider,
    IVectorTileStreamProvider

VB.NET

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.

  View Example

  C#

  using DevExpress.XtraMap;
  using System.IO;
  using System.Windows.Forms;
  
  namespace WinFormsMap {
      public partial class Form1 : Form {
          public Form1() {
              InitializeComponent();
              var layer = new ImageLayer();
              var provider = new CustomVectorTileStreamProvider();
  
              layer.DataProvider = provider;
              mapControl1.Layers.Add(layer);
          }
      }
      public class CustomVectorTileStreamProvider : VectorTileDataProviderBase {
          public override Stream GetStream(long x, long y, long level) {
              string path = Path.GetFullPath("..\\..\\Data\\test.data");
              return File.OpenRead(path);
          }
      }
  }
  

  VB.NET

  Imports DevExpress.XtraMap
  Imports System.IO
  Imports System.Windows.Forms
  
  Namespace WinFormsMap
  
      Public Partial Class Form1
          Inherits Form
  
          Public Sub New()
              InitializeComponent()
              Dim layer = New ImageLayer()
              Dim provider = New CustomVectorTileStreamProvider()
              layer.DataProvider = provider
              mapControl1.Layers.Add(layer)
          End Sub
      End Class
  
      Public Class CustomVectorTileStreamProvider
          Inherits VectorTileDataProviderBase
  
          Public Overrides Function GetStream(ByVal x As Long, ByVal y As Long, ByVal level As Long) As Stream
              Dim path As String = System.IO.Path.GetFullPath("..\..\Data\test.data")
              Return File.OpenRead(path)
          End Function
      End Class
  End Namespace
  

Inheritance

Object

MapDisposableObject

MapImageDataProviderBase

MapTileDataProviderBase

ImageTileDataProvider

VectorTileDataProviderBase

MbTilesDataProvider

UriBasedVectorTileDataProvider

MapboxDataProvider