我有使用windows计算机中的system.device.location api的代码。这应该是相当直接的代码
var watcher = new GeoCoordinateWatcher();
watcher.PositionChanged +=
new EventHandler<GeoPositionChangedEventArgs<
GeoCoordinate>>(GeoPositionChanged);
watcher.Start();
var coord = watcher.Position.Location;
我的意思是我需要做的就是启动一个地理观察者,然后阅读该位置。但它只会返回&#34;位置未知&#34;我想知道代码是否存在问题,或者是否需要在计算机上安装某些东西,或者是什么。我尝试了几个Windows 7个窗口和1个10个窗口,所有这些都在设置中打开了共享位置。那么这段代码出了什么问题呢?如果这有任何不同,这也是geopositionchanged的代码。
private static void GeoPositionChanged(object sender,
GeoPositionChangedEventArgs<GeoCoordinate> e)
{
MessageBox.Show("The current location is: " +
e.Position.Location.Latitude + "/" +
e.Position.Location.Longitude + ".");
}
答案 0 :(得分:2)
等待位置服务准备就绪。您的GeoCoordinateWatcher有一个状态更改事件,另一个用于更改位置。
GeoCoordinateWatcher _watcher;
public Class1()
{
_watcher = new GeoCoordinateWatcher();
_watcher.StatusChanged += Watcher_StatusChanged;
_watcher.PositionChanged += GeoPositionChanged;
_watcher.Start();
var coord = _watcher.Position.Location;
}
private void Watcher_StatusChanged(object sender, GeoPositionStatusChangedEventArgs e)
{
if (e.Status == GeoPositionStatus.Ready)
{
MessageBox.Show("Watcher is ready. First location: The current location is: " +
_watcher.Position.Location.Latitude + "/" +
_watcher.Position.Location.Longitude + ".");
}
}
private static void GeoPositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
{
MessageBox.Show("The current location is: " +
e.Position.Location.Latitude + "/" +
e.Position.Location.Longitude + ".");
}