InformationLayer Class

A layer that is used to display additional information above the map.

Assembly: DevExpress.Xpf.Map.v18.2.dll

Declaration

C#
VB.NET

public class InformationLayer :
    VectorLayerBase

Public Class InformationLayer
    Inherits VectorLayerBase

Remarks

The information layer allows you to place GIS elements (e.g., a search panel) above a map.

GIS elements can be connected to the data provider by assigning the InformationLayer.DataProvider property to the corresponding data provider type. After that, you can send and display the information requests from this provider on a GIS element.

For more information on information layer, see the Layers topic.

Examples

This example demonstrates how to allow users to search for a specific place on a map using the Search panel.

To enable searching in the map control, do the following.

Create an InformationLayer and add it to the MapControl.Layers collection.
Create an instance of the BingSearchDataProvider and assign it to the InformationLayer.DataProvider property.
Specify the Bing Maps key using the BingMapDataProviderBase.BingKey property.

The Search panel appears automatically (since the BingSearchDataProvider.ShowSearchPanel property value is true by default).

NOTE

If you run the application, and see a window with the following error message: ”The specified Bing Maps key is invalid. To create a developer account, refer to https://www.microsoft.com/en-us/maps/create-a-bing-maps-key”, refer to the following tutorial: How to: Get a Bing Maps Key.

NOTE

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-connect-a-map-control-to-a-bing-search-web-service-e4146.

MainWindow.xaml

<dxm:InformationLayer.DataProvider>
    <dxm:BingSearchDataProvider BingKey="{Binding Source={StaticResource YourBingKey}}">
        <dxm:BingSearchDataProvider.SearchOptions>
            <dxm:BingSearchOptions ResultsCount="5" />
        </dxm:BingSearchDataProvider.SearchOptions>
    </dxm:BingSearchDataProvider>
</dxm:InformationLayer.DataProvider>