ElevationsCalculatedEventArgs Class

Provides data for the BingElevationDataProvider.ElevationsCalculated event.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v23.2.dll

NuGet Package: DevExpress.Win.Map

Declaration

C#

public class ElevationsCalculatedEventArgs :
    AsyncCompletedEventArgs

VB.NET

Public Class ElevationsCalculatedEventArgs
    Inherits AsyncCompletedEventArgs

Related API Members

ElevationsCalculatedEventArgs is the data class for the following events:

• BingElevationDataProvider.ElevationsCalculated

Remarks

An instance of the ElevationsCalculatedEventArgs class with appropriate settings is automatically created and passed to the corresponding event’s handler.

Example

This example demonstrates how to receive elevation information from the Bing Maps service.

To do this, request elevation information using the BingElevationDataProvider.RequestPointsElevations method. Then, display the request result using the BingElevationDataProvider.ElevationsCalculated event handler.

Form1.cs

using DevExpress.XtraMap;
using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace BingElevationData {
    public partial class Form1 : Form {
        InformationLayer layer { get { return (InformationLayer)mapControl.Layers[1]; } }
        VectorItemsLayer vectorLayer { get { return (VectorItemsLayer)mapControl.Layers[2]; } }
        BingElevationDataProvider provider { get { return (BingElevationDataProvider)layer.DataProvider; } }
        public Form1() {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e) {
            provider.ElevationsCalculated += OnElevationCalculated;
            provider.GenerateLayerItems = false;
            List<GeoPoint> locations = new List<GeoPoint> {
                new GeoPoint(41.145556, -73.995),
                new GeoPoint(36.131389, -95.937222),
                new GeoPoint(36.175, -115.136389)
            };
            provider.RequestPointsElevations(locations);
        }
        void OnElevationCalculated(object sender, ElevationsCalculatedEventArgs e) {
            MapItemStorage storage = new MapItemStorage();
            foreach (ElevationInformation elevationInformation in e.Result.Locations) {
                storage.Items.Add(new MapCallout() {
                    Text = string.Format("{0}\nElevation = {1} m", elevationInformation.Location, elevationInformation.Elevation),
                    Location = elevationInformation.Location
                });
            }
            vectorLayer.Data = storage;
        }
    }
}

Form1.vb

Imports DevExpress.XtraMap
Imports System
Imports System.Collections.Generic
Imports System.Windows.Forms

Namespace BingElevationData
    Partial Public Class Form1
        Inherits Form

        Private ReadOnly Property layer() As InformationLayer
            Get
                Return CType(mapControl.Layers(1), InformationLayer)
            End Get
        End Property
        Private ReadOnly Property vectorLayer() As VectorItemsLayer
            Get
                Return CType(mapControl.Layers(2), VectorItemsLayer)
            End Get
        End Property
        Private ReadOnly Property provider() As BingElevationDataProvider
            Get
                Return CType(layer.DataProvider, BingElevationDataProvider)
            End Get
        End Property
        Public Sub New()
            InitializeComponent()
        End Sub
        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
            AddHandler provider.ElevationsCalculated, AddressOf OnElevationCalculated
            provider.GenerateLayerItems = False
            Dim locations As New List(Of GeoPoint)() From { _
                New GeoPoint(41.145556, -73.995), _
                New GeoPoint(36.131389, -95.937222), _
                New GeoPoint(36.175, -115.136389) _
            }
            provider.RequestPointsElevations(locations)
        End Sub
        Private Sub OnElevationCalculated(ByVal sender As Object, ByVal e As ElevationsCalculatedEventArgs)
            Dim storage As New MapItemStorage()
            For Each elevationInformation As ElevationInformation In e.Result.Locations
                storage.Items.Add(New MapCallout() With {.Text = String.Format("{0}" & ControlChars.Lf & "Elevation = {1} m", elevationInformation.Location, elevationInformation.Elevation), .Location = elevationInformation.Location})
            Next elevationInformation
            vectorLayer.Data = storage
        End Sub
    End Class
End Namespace

Inheritance

Object

EventArgs

AsyncCompletedEventArgs

ElevationsCalculatedEventArgs