GeoCoordinateWatcher.OnPositionChanged(GeoPositionChangedEventArgs<GeoCoordinate>) Metodo

Definizione

Chiamato quando si verifica un evento PositionChanged.Called when a PositionChanged event occurs.

protected:
 void OnPositionChanged(System::Device::Location::GeoPositionChangedEventArgs<System::Device::Location::GeoCoordinate ^> ^ e);
protected void OnPositionChanged (System.Device.Location.GeoPositionChangedEventArgs<System.Device.Location.GeoCoordinate> e);
member this.OnPositionChanged : System.Device.Location.GeoPositionChangedEventArgs<System.Device.Location.GeoCoordinate> -> unit
Protected Sub OnPositionChanged (e As GeoPositionChangedEventArgs(Of GeoCoordinate))

Parametri

e
GeoPositionChangedEventArgs<GeoCoordinate>

Oggetto GeoPositionChangedEventArgs<T> che contiene il nuovo percorso.A GeoPositionChangedEventArgs<T> object that contains the new location.

Esempi

Nel programma seguente viene illustrato come sottoscrivere gli aggiornamenti continui PositionChanged da eventi.The following program shows how to subscribe to continuous updates from PositionChanged events.

using System;
using System.Device.Location;

namespace GetLocationEvent
{
    class Program
    {
        static void Main(string[] args)
        {
            CLocation myLocation = new CLocation();
            myLocation.GetLocationEvent();
            Console.WriteLine("Enter any key to quit.");
            Console.ReadLine();            
        }
        class CLocation
        {
            GeoCoordinateWatcher watcher;

            public void GetLocationEvent()
            {
                this.watcher = new GeoCoordinateWatcher();
                this.watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);
                bool started = this.watcher.TryStart(false, TimeSpan.FromMilliseconds(2000));
                if (!started)
                {
                    Console.WriteLine("GeoCoordinateWatcher timed out on start.");
                }
            }

            void watcher_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
            {
                PrintPosition(e.Position.Location.Latitude, e.Position.Location.Longitude);
            }

            void PrintPosition(double Latitude, double Longitude)
            {
                Console.WriteLine("Latitude: {0}, Longitude {1}", Latitude, Longitude);
            }
        }
    }
}
Imports System.Device.Location

Module GetLocationEvent
    Public Class CLocation
        Private WithEvents watcher As GeoCoordinateWatcher
        Public Sub GetLocationEvent()
            watcher = New System.Device.Location.GeoCoordinateWatcher()
            AddHandler watcher.PositionChanged, AddressOf watcher_PositionChanged
            Dim started As Boolean = watcher.TryStart(False, TimeSpan.FromMilliseconds(1000))

            If Not started Then
                Console.WriteLine("GeoCoordinateWatcher timed out on start.")
            End If
        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)
        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()
        myLocation.GetLocationEvent()
        Console.WriteLine("Enter any key to quit.")
        Console.ReadLine()
    End Sub

End Module

Si applica a