VectorTileDataProviderBase.GetStream(Int64, Int64, Int64) Method
In This Article
Returns a stream that contains a vector tile with specific coordinates at a specified zoom level.
Namespace: DevExpress.XtraMap
Assembly: DevExpress.XtraMap.v24.2.dll
NuGet Package: DevExpress.Win.Map
#Declaration
#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.
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); } } }
See Also