GeoCoordinateWatcher.StatusChanged 事件
定义
重要
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指示 GeoCoordinateWatcher 对象的状态已更改。
public:
event EventHandler<System::Device::Location::GeoPositionStatusChangedEventArgs ^> ^ StatusChanged;public event EventHandler<System.Device.Location.GeoPositionStatusChangedEventArgs> StatusChanged;member this.StatusChanged : EventHandler<System.Device.Location.GeoPositionStatusChangedEventArgs> Public Custom Event StatusChanged As EventHandler(Of GeoPositionStatusChangedEventArgs) Public Event StatusChanged As EventHandler(Of GeoPositionStatusChangedEventArgs) 事件类型
实现
示例
以下示例演示如何处理 StatusChanged 事件。
using System;
using System.Device.Location;
namespace ShowStatusUpdates
{
class Program
{
static void Main(string[] args)
{
ShowStatusUpdates();
}
static void ShowStatusUpdates()
{
GeoCoordinateWatcher watcher = new GeoCoordinateWatcher();
watcher.Start();
watcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_StatusChanged);
Console.WriteLine("Enter any key to quit.");
Console.ReadLine();
}
static void watcher_StatusChanged(object sender, GeoPositionStatusChangedEventArgs e)
{
switch (e.Status)
{
case GeoPositionStatus.Initializing:
Console.WriteLine("Working on location fix");
break;
case GeoPositionStatus.Ready:
Console.WriteLine("Have location");
break;
case GeoPositionStatus.NoData:
Console.WriteLine("No data");
break;
case GeoPositionStatus.Disabled:
Console.WriteLine("Disabled");
break;
}
}
}
}
Imports System.Device.Location
Module GetLocationEvent
Sub ShowStatusUpdates()
Dim Watcher As GeoCoordinateWatcher
Watcher = New GeoCoordinateWatcher()
watcher.Start()
AddHandler Watcher.StatusChanged, AddressOf watcher_StatusChanged
Console.WriteLine("Enter any key to quit.")
Console.ReadLine()
End Sub
Sub watcher_StatusChanged(ByVal sender As Object, ByVal e As GeoPositionStatusChangedEventArgs)
Select Case e.Status
Case GeoPositionStatus.Initializing
Console.WriteLine("Working on location fix")
Case GeoPositionStatus.Ready
Console.WriteLine("Have location")
Case GeoPositionStatus.NoData
Console.WriteLine("No data")
Case GeoPositionStatus.Disabled
Console.WriteLine("Disabled")
End Select
End Sub
Public Sub Main()
ShowStatusUpdates()
End Sub
End Module
注解
事件 StatusChanged 在创建对象的同一线程 GeoCoordinateWatcher 上引发。
