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GeoCoordinateWatcher.PositionChanged Event

Indicates that the latitude or longitude of the location data has changed.

Namespace:  System.Device.Location
Assembly:  System.Device (in System.Device.dll)

public event EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>> PositionChanged

This event is only raised when the distance moved since the last event exceeds the threshold that is specified by MovementThreshold.

The GeoPositionChangedEventArgs<T> object passed to the event handler includes the GeoPosition<T> object that contains the updated location data.

The following example shows how to handle the first PositionChanged event.

using System;
using System.Device.Location;

namespace LocationEvent1
{
    class Program
    {
        static void Main(string[] args)
        {
            GeoCoordinateWatcher watcher;
            watcher = new GeoCoordinateWatcher();

            watcher.PositionChanged += (sender, e) =>
            {
                var coordinate = e.Position.Location;
                Console.WriteLine("Lat: {0}, Long: {1}", coordinate.Latitude,
                    coordinate.Longitude);
                // Uncomment to get only one event. 
                // watcher.Stop(); 
            };

            // Begin listening for location updates.
            watcher.Start();
        }
    }
}

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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