在Windows Phone 8中获取思域地址 [英] Get Civic Address in Windows Phone 8

问题描述

我试图通过WP8中的Geolocator获得公民地址。但它抛出一个 System.NullReferenceException

  private void geolocator_PositionChanged（Geolocator sender，PositionChangedEventArgs args）
 {
 Dispatcher.BeginInvoke（（）=> 
 {
 LatitudeTextBlock.Text = args.Position.Coordinate.Latitude.ToString（）; 
 LongitudeTextBlock.Text = args .Position.Coordinate.Longitude.ToString（）; 
 Tblock.Text = args.Position.CivicAddress.Country; 
}）; 
} 
  

也已经尝试过 Geoposition 。仍然抛出异常。尝试了一个有条件的检查，没用。请帮助

[更新]

按钮点击：

  private void TrackLocation_Tap（object sender，System.Windows.Input.GestureEventArgs e）
 {
 Geolocator geolocator = new Geolocator （）; 
 geolocator.DesiredAccuracy = PositionAccuracy.High; 
 geolocator.MovementThreshold = 1; //这个单位是Meters 
 geolocator.StatusChanged + = geolocator_StatusChanged; 
 geolocator.PositionChanged + = geolocator_PositionChanged; 
 TrackLocation.Content =停止追踪; 
 
  

解决方案

如果您想获得地址对于一个职位，那么我会建议你使用Reverse GeocodeQuery API与你使用Geolocator API的位置，以供参考实现我有一个例子可在 github

I'm trying to get the civic address via Geolocator in WP8. But it throws a System.NullReferenceException

private  void geolocator_PositionChanged(Geolocator sender, PositionChangedEventArgs args)
{
     Dispatcher.BeginInvoke(() =>
      {
           LatitudeTextBlock.Text = args.Position.Coordinate.Latitude.ToString();
           LongitudeTextBlock.Text = args.Position.Coordinate.Longitude.ToString();
           Tblock.Text = args.Position.CivicAddress.Country;
      });
}

already tried with Geoposition also. Still throws exception. Tried a conditional check, no use. Please help

[UPDATE]

The button click:

private void TrackLocation_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
     Geolocator geolocator = new Geolocator();
     geolocator.DesiredAccuracy = PositionAccuracy.High;
     geolocator.MovementThreshold = 1; // This units are in Meters
     geolocator.StatusChanged += geolocator_StatusChanged;
     geolocator.PositionChanged += geolocator_PositionChanged;
     TrackLocation.Content = "Stop Tracking";
}

解决方案

If you want to get address for a position, then I would suggest you use ReverseGeocodeQuery API with the position you get with the Geolocator API, for reference implementation I do have an example available at github

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