GeoCoordinateWatcher.PositionChanged GeoCoordinateWatcher.PositionChanged GeoCoordinateWatcher.PositionChanged GeoCoordinateWatcher.PositionChanged Event


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

 event EventHandler<System::Device::Location::GeoPositionChangedEventArgs<System::Device::Location::GeoCoordinate ^> ^> ^ PositionChanged;
public event EventHandler<System.Device.Location.GeoPositionChangedEventArgs<System.Device.Location.GeoCoordinate>> PositionChanged;
member this.PositionChanged : EventHandler<System.Device.Location.GeoPositionChangedEventArgs<System.Device.Location.GeoCoordinate>> 
Public Event PositionChanged As EventHandler(Of GeoPositionChangedEventArgs(Of GeoCoordinate)) 


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,
                // Uncomment to get only one event.
                // watcher.Stop(); 

            // Begin listening for location updates.
Imports System.Device.Location
Module GetLocationEvent
    Public Class CLocation
        Private WithEvents watcher As GeoCoordinateWatcher
        Public Sub GetLocationDataEvent()
            watcher = New System.Device.Location.GeoCoordinateWatcher()
            AddHandler watcher.PositionChanged, AddressOf watcher_PositionChanged

        End Sub

        Private Sub watcher_PositionChanged(ByVal sender As Object, ByVal e As GeoPositionChangedEventArgs(Of GeoCoordinate))
            PrintPosition(e.Position.Location.Latitude, e.Position.Location.Longitude)
            ' Uncomment the following to stop receiving updates after the first one.
            ' watcher.Stop()
        End Sub

        Private Sub PrintPosition(ByVal Latitude As Double, ByVal Longitude As Double)
            Console.WriteLine("Latitude: {0}, Longitude {1}", Latitude, Longitude)
        End Sub
    End Class

    Public Sub Main()
        Dim myLocation As New CLocation()
        Console.WriteLine("Enter any key to quit.")
    End Sub

End Module


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.

Applies to

See Also