How to add a PushPin item to a map? Windows Phone

问题:

I'm trying to draw a pushpin to a map in the map page of my application but when I add the code to overlay a pushpin to the map, I get the following errors:

The type or namespace name PushPin could not be found (are you missing a using directive or an assembly reference?)

and

Microsoft.Phone.Maps.Controls.Map does not contain a definition for Children and no extension method Children accepting a first argument of type Microsoft.Phone.Maps.Controls.Map could be found

I understand from this that I'm missing a reference? I have references for controls.maps and contols.toolkit, so I can't understand why.

Also this is the code I'm using to draw the pushpin:

PushPin myPin = new Pushpin();
myPin.Location = MyGeoPosition;
myPin.Content = "My car";
MyMap.Children.Add(myPin);

回答1:

Try this.

MapLayer layer1 = new MapLayer();

Pushpin pushpin1 = new Pushpin();

pushpin1.GeoCoordinate = MyGeoPosition;
pushpin1.Content = "My car";
MapOverlay overlay1 = new MapOverlay();
overlay1.Content = pushpin1;
overlay1.GeoCoordinate = MyGeoPosition;
layer1.Add(overlay1);

myMap.Layers.Add(layer1);

You create new overlay for each pushpin, add all overlays to a layer, and add the layer to the map element.

回答2:

You can try..

 BitmapImage myImage1; myImage1 = new BitmapImage(new    Uri("/Assets/Images/pushpin-google-hi.png",    UriKind.RelativeOrAbsolute)); 
 var image = new Image(); 
 image.Width = 50; 
 image.Height = 50; 
 image.Opacity = 100; 
 image.Source = myImage1;

 var mapOverlay = new MapOverlay();
 mapOverlay.Content = image;
 mapOverlay.GeoCoordinate = new GeoCoordinate(lats, lons);
 var mapLayer = new MapLayer();
 mapLayer.Add(mapOverlay);
 MyMap.Layers.Add(mapLayer);
 MyMap.SetView(new GeoCoordinate(lats, lons), 16);

回答3:

Try this. First I have this in a utils class:

public MapLayer GetCurrentPosition (out MapOverlay myPositionOverlay)
        {
            MapLayer myPositionLayer = new MapLayer();
            myPositionOverlay = new MapOverlay();
            Image myPositionImage = new Image();
            myPositionImage.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("/Assets/myImagePin.png", UriKind.RelativeOrAbsolute));
            myPositionImage.Height = 70;
            myPositionImage.Visibility = Visibility.Visible;
            myPositionImage.HorizontalAlignment = HorizontalAlignment.Center;
            myPositionOverlay.Content = myPositionImage;
            myPositionLayer.Add(myPositionOverlay);
            return myPositionLayer;
        }

Then this goes on your MapLoaded method:

MapLayer mypositionArrow = placePushPins.GetCurrentPosition(out myPositionOverlay);
        MyMap.Layers.Add(mypositionArrow);

Then, if you want your pushpin not to be static, to move according to your position, add this to your watcher:

myPositionOverlay.GeoCoordinate = myCurrentPositionCoordinate;

To make the pushpin move smoothly just implement animation like this: http://blogs.bing.com/maps/2014/09/25/part-2-bring-your-maps-to-life-creating-animations-with-bing-maps-net/