如何将地图图钉从当前位置绘制并保存到地图？视窗手机

Question

我已经开始在Windows手机应用程序中使用地图，我已经知道如何获得当前坐标，但我不确定如何将其绘制为地图上的图钉。

这就是我到目前为止调用GetCoordinates方法并在单击按钮时导航到地图的内容。有人知道我怎么把坐标传递给地图并把它画成图钉吗?

private async Task GetCoordinates(string name = "My Car")
        {
            await Task.Run(async () =>
            {
                // Get the phone's current location.
                Geolocator MyGeolocator = new Geolocator();
                MyGeolocator.DesiredAccuracyInMeters = 5;
                Geoposition MyGeoPosition = null;
                try
                {
                    MyGeoPosition = await MyGeolocator.GetGeopositionAsync(TimeSpan.FromMinutes(1), TimeSpan.FromSeconds(10));
                }
                catch (UnauthorizedAccessException)
                {
                    MessageBox.Show("Location is disabled in phone settings or capabilities are not checked.");
                }
                catch (Exception ex)
                {
                    // Something else happened while acquiring the location.
                    MessageBox.Show(ex.Message);
                }
            });
        }

        //sets location of parking space using the GetCoordinates method
        //opens map 
        private async void setLocationBtn_Click(object sender, RoutedEventArgs e)
        { 
            await this.GetCoordinates();
            NavigationService.Navigate(new Uri("/Maps.xaml", UriKind.Relative));
        }

这是地图类，它什么都没做，有没有办法把前一个类的地理坐标传递给地图，然后画一个图钉?我想在OnNavigatedTo方法中这样做:

public partial class Maps: PhoneApplicationPage{Geolocator = null;Bool跟踪= false;ProgressIndicatorπ;MapLayer PushpinMapLayer;

    public Maps()
    {
        InitializeComponent();
        pi = new ProgressIndicator();
        pi.IsIndeterminate = true;
        pi.IsVisible = false;
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
    }
}

Answer 1

添加图钉:

        var overlay = new MapOverlay
        {
            PositionOrigin = new Point(0.5, 0.5),
            GeoCoordinate = location, // takes a GeoCoordinate instance. convert Geoposition to GeoCoordinate
            Content = new TextBlock{Text = "hello"}; // you can use any UIElement as a pin
        };
        var ml = new MapLayer { overlay }; 
        map.Layers.Add(ml);

你可以在传递给NavigationSerivce.Navigate的URI中附加你所在位置的经纬度作为查询，并在e.Uri.Query的OnNavigatedTo事件处理程序中提取它。

提示。Task.Run将任务调度到线程池上运行。您的任务不受cpu限制，因此是task。运行不会给你带来任何性能提升。

编辑:

将Geoposition转换为GeoCoordinate

var location = new GeoCoordinate(geoposition.Coordinate.Latitude, geoposition.Coordinate.Longitude); 

一个非常有用的资源是Nokia WP8指南