Simple GPS Layer

This sample demonstrates how to use the ArcGIS Runtime SDK for WPF to leverage the Microsoft Location API and the GpsLayer to show your location on a map.

Note: This sample requires Microsoft .Net 4.0 or higher on the Windows 7 operating system and a location provider, such as a GPS device. For more information please see http://msdn.microsoft.com/en-us/library/windows/desktop/dd317661(v=VS.85).aspx and http://msdn.microsoft.com/en-us/library/ee426011.aspx

XAML

<UserControl x:Class="ArcGISWPFSDK.SimpleGpsLayer"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:esri="http://schemas.esri.com/arcgis/client/2009">
    <Grid>
        <esri:Map x:Name="_mapControl">
            <esri:ArcGISTiledMapServiceLayer ID="arcGISTiledMapServiceLayer" Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer" />
            <esri:GpsLayer x:Name="_gpsLayer" ID="gpsLayer" PositionChanged="GpsLayer_PositionChanged"/>
        </esri:Map>
    </Grid>
</UserControl>

C#

using System;
using System.Windows.Controls;
using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Toolkit;

namespace ArcGISWPFSDK
{
    /// <summary>
    /// Interaction logic for GpsLayer.xaml
    /// </summary>
    public partial class SimpleGpsLayer : UserControl
    {
        //track the last reported point
        ESRI.ArcGIS.Client.Geometry.MapPoint _lastPosition;

        public SimpleGpsLayer()
        {
            InitializeComponent();
        }

        private void GpsLayer_PositionChanged(object sender, EventArgs e)
        {
            if (_gpsLayer.Position != _lastPosition)
            {
                //Zoom the map to the current GPS position
                _lastPosition = _gpsLayer.Position;
                _mapControl.ZoomTo(new ESRI.ArcGIS.Client.Geometry.Envelope(
                    _gpsLayer.Position.X - 1000,
                    _gpsLayer.Position.Y - 1000,
                    _gpsLayer.Position.X + 1000,
                    _gpsLayer.Position.Y + 1000));
            }
        }
    }
}

VB.NET

Imports System.Windows.Controls
Imports ESRI.ArcGIS.Client.Geometry

''' <summary>
''' Interaction logic for GpsLayer.xaml
''' </summary>
Namespace ArcGISWPFSDK
    Partial Public Class SimpleGpsLayer
        Inherits UserControl
        'track the last reported point
        Private _lastPosition As MapPoint

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub GpsLayer_PositionChanged(sender As Object, e As EventArgs)
            If _gpsLayer.Position IsNot _lastPosition Then
                'Zoom the map to the current GPS position
                _lastPosition = _gpsLayer.Position
                _mapControl.ZoomTo(New Envelope(_gpsLayer.Position.X - 1000, _gpsLayer.Position.Y - 1000, _gpsLayer.Position.X + 1000, _gpsLayer.Position.Y + 1000))
            End If
        End Sub
    End Class
End Namespace