How to add tooltip in map windows phone 8? - windows-phone-8

Question

My windows 8 phone app programatically add an image (as a pin) to a specific coordinataion in map using mapoverlay. And now i would like to add a tooltip to the image (pin) after tapping on it. Does anyone know how to fix this?
pinIMG = new Image();
pinIMG.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("/Assets/pin.png", UriKind.Relative));
MapOverlay myLocationOverlay = new MapOverlay();
myLocationOverlay.Content = pinIMG;
myLocationOverlay.PositionOrigin = new Point(0.5, 0.5);
myLocationOverlay.GeoCoordinate = new GeoCoordinate(57.724611, 12.938945);
MapLayer myLocationLayer = new MapLayer();
myLocationLayer.Add(myLocationOverlay);
MyMap.Layers.Add(myLocationLayer);

Answer 1

Instead of adding an Image to the MapOverlay, consider adding an ExpanderView control that expands to add additional data. You'll need to download the Windows Phone Toolkit to get the ExpanderView control. While you're at it you might want to switch over to using Map Extensions Pushpins to get databinding support.
private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
MapLayer myLayer = new MapLayer();
MapOverlay myOverlay = new MapOverlay()
{
GeoCoordinate = new GeoCoordinate(-17, 133)
};
ExpanderView expander = new ExpanderView();
expander.Header = new Image()
{
Source = new BitmapImage(new Uri("Assets/ApplicationIcon.png", UriKind.Relative)),
Width = 200
};
expander.ItemsSource = new[]
{
new TextBlock{ Text = "HELLO"}
};
;
myOverlay.Content = expander;
myLayer.Add(myOverlay);
myMap.Layers.Add(myLayer);
}
When we run this sample we can see the following icon over australia:
And once we click ti we can see our "Hello" text show up:
A few ceavets: the code sample above is terrible. ExpanderView is meant to use both ItemSource and IteTemplate for multiple items databinding. Using it for a single item isn't great. The above code sample is also terrible since it creates UI elements in C# code whereas using Map Extensions could have placed this code in XAML.