返回的Windows Phone 7从GeoCoordinateWatcher.StatusChanged事件的位置数据 [英] Return the location data from GeoCoordinateWatcher.StatusChanged event in Windows Phone 7

问题描述

我正在写一个Windows Phone应用程序，我需要得到用户的位置。我想这在一个很好的方式（以及尽我所能），使用一个单独的类在那里我查询 GeoCoordinateWatcher 位置数据和数据恢复调用方法。

现在的问题是，我不知道如何返回的 LocationData 结构来调用从的 GeoCoordinateWatcher 的 StatusChanged 事件的方法。看到代码和放大器;评论：

 公共结构LocationData 
 {
公共字符串纬度; 
公共字符串经度; 
} 
 
 
公共类LocationService：GeoCoordinateWatcher 
 {
私人GeoCoordinateWatcher守望者; 
 
私人LocationData StartLocationWatcher（）
 {
 LocationData LD =新LocationData（）; 
 
 //监视器可以变以前声明为类型GeoCoordinateWatcher。 
如果（观察者== NULL）
 {
观察家=新GeoCoordinateWatcher（GeoPositionAccuracy.High）; 
} 
 
 watcher.MovementThreshold = 20; //使用MovementThreshold忽略信号中的噪声。 
 
 watcher.StatusChanged + =（0，参数）=> 
 {
开关（args.Status）
 {
情况下GeoPositionStatus.Ready：
 //使用GeoCoordinateWatcher对象的位置属性来获取当前位置。 
会有地理座标共同= watcher.Position.Location; 
 
 ld.latitude = co.Latitude.ToString（0.000）; 
 ld.longitude = co.Longitude.ToString（0.000）; 
 
 //停止定位服务，以节省电池电量。 
 
 watcher.Stop（）; 
中断; 
} 
}; 
 
 watcher.Start（）; 
返回LD; //需要这个返回到调用方法，从GeoCoordinateWatcher 
} 
} 
  

$ B $采取经纬度数据b

解决方案

我不知道，如果这是你追求的。

注册PositionChanged事件：

GeoCoordinateWatcher.PositionChanged + = GeoCoordinateWatcherPositionChanged;

 私人无效GeoCoordinateWatcherPositionChanged（对象发件人，GeoPositionChangedEventArgs<&会有地理座标GT; E）
 {
 VAR currentLatitude = e.Position.Location.Latitude; 
 VAR currentLongitude = e.Position.Location.Longitude; 
} 
  

的何时PositionChanged将触发更多。

I'm writing a Windows Phone app where I need to get user's location. I'm trying to this in a nice way (well as much as I can), using a separate class where I'm querying GeoCoordinateWatcher for location data and return that data to calling method.

The problem is, I don't know how to return the the LocationData struct to the calling method from the StatusChanged event of the GeoCoordinateWatcher. See the code & comments:

public struct LocationData
{
    public string latitude;
    public string longitude;
}


public class LocationService : GeoCoordinateWatcher
{
    private GeoCoordinateWatcher watcher;

    private LocationData StartLocationWatcher()
    {
        LocationData ld = new LocationData();

        // The watcher variable was previously declared as type GeoCoordinateWatcher.
        if (watcher == null)
        {
            watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High);
        }

        watcher.MovementThreshold = 20; // Use MovementThreshold to ignore noise in the signal.

        watcher.StatusChanged += (o, args) =>
            {
                switch (args.Status)
                {
                    case GeoPositionStatus.Ready:
                       // Use the Position property of the GeoCoordinateWatcher object to get the current location.
                       GeoCoordinate co = watcher.Position.Location;

                       ld.latitude = co.Latitude.ToString("0.000");
                       ld.longitude = co.Longitude.ToString("0.000");

                       //Stop the Location Service to conserve battery power.

                       watcher.Stop();
                       break;
               }
           };

        watcher.Start();
        return ld; //need to return this to the calling method, with latitude and longitude data taken from GeoCoordinateWatcher
    }
}

解决方案

I'm not sure if this is what you're after.

Register the PositionChanged event:

GeoCoordinateWatcher.PositionChanged += GeoCoordinateWatcherPositionChanged;

private void GeoCoordinateWatcherPositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
{
    var currentLatitude = e.Position.Location.Latitude;
    var currentLongitude = e.Position.Location.Longitude;
}

More on when PositionChanged will fire.

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