Saturday 21 March 2009

Silverlight VirtualEarth Map Control - Search Results

Try out a basic search results view using the Silverlight VirtualEarth Map Control at

Searcharoo with Silverlight Map Control

Thanks to Chris Pietschmann's Tooltip example each pin shows what search result it refers too (although I still haven't figured out to make the pins 'click-able' to open the result link directly...).

The relevant code added to the search result JSON parsing:

1. Create a MapLayer
MapLayer PinMapLayer = new MapLayer();

2. Add it to the Map control first (ie. before adding Children)

3. Extract GPS location
var l = new Location(
, Convert.ToDouble(result.gps.Split(',')[0])

4. Create the pin (Image), add tooltip and add to MapLayer
Image pin = new Image();
pin.Source = new BitmapImage(new Uri("blue_pushpin.png", UriKind.RelativeOrAbsolute));
pin.Stretch = Stretch.None;

var tooltipObject = new StackPanel();
var title = new TextBlock();
title.FontWeight = FontWeights.Bold;
title.Text =;
var description = new TextBlock();
description.Text = result.description;
ToolTipService.SetToolTip(pin, tooltipObject);

// Adds the pushpin to the map layer.
PinMapLayer.AddChild(pin, l, PositionMethod.BottomCenter);

The search box is pre-populated with manhattan which results in a set of photos.

Perform that search, then search for sydney to see how the VirtualEarth Silverlight Map Control animates between the two locations with nothing more than a simple call to SetView

ResultMap.SetView(GetMinMaxCenter(min, max), 12);

The complete code will be available on Searcharoo@Codeplex shortly.

p.s. another search to try is - pumpkin - geocoded photos are so cool!

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