AzureSearchDataProvider Class

Contains settings that are used by requests to the Azure Maps Search service.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v25.1.dll

NuGet Package: DevExpress.Win.Map

Declaration

C#

public class AzureSearchDataProvider :
    AzureMapDataProviderBase,
    ISearchPanelRequestSender

VB.NET

Public Class AzureSearchDataProvider
    Inherits AzureMapDataProviderBase
    Implements ISearchPanelRequestSender

Remarks

AzureSearchDataProvider implements the Azure Maps Search service. Assign such an object to the InformationLayer.DataProvider property to display the search panel and allow users to search for a specific place on a map. To hide the search panel, set the MapSearchPanelOptions.Visible property to false.

Azure Maps services support JSON response formats. Install the System.Text.Json package in projects that target .NET Framework to parse the Azure server response and display information on a DevExpress Map control.

Search at Runtime

Call one of the AzureSearchDataProvider.Search overloads to search for locations that correspond to the specified attributes. The maxResults parameter of the Search method overloads allows you to specify the number of results that can be obtained by a search request.

The following example searches for locations that correspond to the specified AzureAddress:

C#

using DevExpress.XtraMap;
// ...
const string azureKey = "your key";
// ...
private void Form1_Load(object sender, EventArgs e) {
    // Create a map control.
    MapControl map = new MapControl();
    // Specify the map position on the form.           
    map.Dock = DockStyle.Fill;
    // Create a layer.
    ImageLayer layer1 = new ImageLayer();
    layer1.DataProvider = new AzureMapDataProvider() {
        AzureKey = azureKey,
        // Set Imagery tileset to display a satellite or aerial imagery on a layer.
        Tileset = AzureTileset.Imagery,
    };
    // Create a layer.
    ImageLayer layer2 = new ImageLayer();
    layer2.DataProvider = new AzureMapDataProvider(){
        AzureKey = azureKey,
        // Set BaseLabelsRoad tileset to display boundaries and label data in the Azure Map style on a layer.
        Tileset = AzureTileset.BaseLabelsRoad,
    };
    // Connect to Azure Maps Search service.
    AzureSearchDataProvider azureSearchProvider = new AzureSearchDataProvider() {
        AzureKey = azureKey,
    };
    // Specify the address info.
    azureSearchProvider.Search(new AzureAddress() {
        AddressLine = "15127 NE 24th St",
        CountryRegion = "United States",
        AdminDistricts = new string[,] { { "WA" } , {"King County"} }, 
        Locality = "Redmond",
        PostalCode = "98052"
    }, 5);
    // Create a layer.
    InformationLayer informationLayer = new InformationLayer();
    informationLayer.DataProvider = azureSearchProvider;
    // Zoom the map to fit the search result.
    informationLayer.DataRequestCompleted += OnDataRequestCompleted;
    void OnDataRequestCompleted(object sender, RequestCompletedEventArgs e) {
        map.ZoomToFitLayerItems(0.4);
    }
    // Specify the map zoom level and center point. 
    map.ZoomLevel = 3;
    map.CenterPoint = new GeoPoint(40, -100);
    // Add the created layers to the collection.
    map.Layers.AddRange(new LayerBase[] {
        layer1, layer2, informationLayer});
    // Hide the Search Panel.
    map.SearchPanelOptions.Visible = false;
    // Add the map control to the window.
    this.Controls.Add(map);
}

VB.NET

Imports DevExpress.XtraMap
' ...
Private Const azureKey As String = "your key"
' ...
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
    ' Create a map control.
    Dim map As New MapControl()
    ' Specify the map position on the form.           
    map.Dock = DockStyle.Fill
    ' Create a layer.
    Dim layer1 As New ImageLayer()
    layer1.DataProvider = New AzureMapDataProvider() With {
        .AzureKey = azureKey,
        .Tileset = AzureTileset.Imagery
    }
    ' Create a layer.
    Dim layer2 As New ImageLayer()
    layer2.DataProvider = New AzureMapDataProvider() With {
        .AzureKey = azureKey,
        .Tileset = AzureTileset.BaseLabelsRoad
    }
    ' Connect to Azure Maps Search service.
    Dim azureSearchProvider As New AzureSearchDataProvider() With {.AzureKey = azureKey}
    ' Specify the address info.
    azureSearchProvider.Search(New AzureAddress() With {
        .AddressLine = "15127 NE 24th St",
        .CountryRegion = "United States",
        .AdminDistricts = New String(, ) {
            { "WA" },
            {"King County"}
        },
        .Locality = "Redmond",
        .PostalCode = "98052"
    }, 5)
    ' Create a layer.
    Dim informationLayer As New InformationLayer()
    informationLayer.DataProvider = azureSearchProvider
    ' Zoom the map to fit the search result.
  Private informationLayer.DataRequestCompleted += AddressOf OnDataRequestCompleted
    Private Sub OnDataRequestCompleted(ByVal sender As Object, ByVal e As RequestCompletedEventArgs)
        map.ZoomToFitLayerItems(0.4)
    End Sub
    ' Specify the map zoom level and center point. 
    map.ZoomLevel = 3
    map.CenterPoint = New GeoPoint(40, -100)
    ' Add the created layers to the collection.
    map.Layers.AddRange(New LayerBase() {layer1, layer2, informationLayer})
    ' Hide the Search Panel.
    map.SearchPanelOptions.Visible = False
    ' Add the map control to the window.
    Me.Controls.Add(map)
End Sub

Obtain Search Results

To get search results, handle the AzureSearchDataProvider.SearchCompleted event. The SearchCompletedEventArgs.RequestResult returns a SearchRequestResult descendant that stores search results.

The results contain a display name, address, and the geographic coordinates (latitude and longitude) associated with the search location:

Implements

ISupportWebRequest

ISearchPanelRequestSender

Inheritance

Object

InformationDataProviderBase

WebInformationDataProvider

AzureMapDataProviderBase

AzureSearchDataProvider