GeoCoordinateWatcher.PositionChanged Olay

Tanım

Ad Alanı:

System.Device.Location

Bütünleştirilmiş Kod:

System.Device.dll

Konum verilerinin enlem veya boylamının değiştiğini gösterir.

public:
 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)) 

Olay Türü

EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>

Uygulamalar

PositionChanged

Örnekler

Aşağıdaki örnekte ilk PositionChanged olayın nasıl işlenmeleri gösterilmektedir.

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();
        }
    }
}

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
            watcher.Start()

        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()
        myLocation.GetLocationDataEvent()
        Console.WriteLine("Enter any key to quit.")
        Console.ReadLine()
    End Sub

End Module

Açıklamalar

Bu olay yalnızca son olaydan bu yana taşınan mesafe tarafından MovementThresholdbelirtilen eşiği aştığında oluşur.

Olay GeoPositionChangedEventArgs<T> işleyicisine geçirilen nesne, güncelleştirilmiş konum verilerini içeren nesneyi içerir GeoPosition<T> .

Ayrıca bkz.

• MovementThreshold