public partial class MainPage : UserControl

    {

        public MainPage()

        {

            InitializeComponent();

        }

        private void map1_WindowRectChanged(object sender, Infragistics.Silverlight.Map.MapWindowRectChangedEventArgs e)

        {

            XamWebMap map1 = (XamWebMap)sender;

            if (Math.Round(map1.ScaleToZoom(e.WindowScale)) == 3)

            {

                MapLayer layer = (MapLayer)map1.Layers.FindName("worldLayer").ElementAt(0);

                IEnumerable<MapElement> elements = layer.Elements.FindElement("Caption", "UNITED STATES") as IEnumerable<MapElement>;

                if (elements.Count<MapElement>() > 0)

                {

                    MapElement element = elements.ElementAt<MapElement>(0) as MapElement;

                    element.Caption = null;

                }

            }

        }

        private void map1_ElementClick(object sender, MapElementClickEventArgs e)

        {

            if (e.Element != null && e.Element.Caption == "UNITED STATES")

            {

                map1.WindowFit(e.Element);

                MapLayer statesLayer = new MapLayer();

                statesLayer.Name = "statesLayer";

                statesLayer.VisibleFromScale = 2;

                DataMapping.Converter converter = new DataMapping.Converter();

                ShapeFileReader reader = new ShapeFileReader();

                reader.Uri = "ShapeFiles/usa_st";

                reader.DataMapping = (DataMapping)converter.ConvertFromString("Caption=STATE_ABBR");

                statesLayer.Reader = reader;

                map1.Layers.Add(statesLayer);

                statesLayer.ImportAsync();

            }

        }

    }

Here's a sample based on the link I provided above. I believe the crucial part you are missing is to tell the MapLayer to import its content from the shapefile. Something the control does for you with designtime layers.

This is the line you are looking for:

statesLayer.ImportAsync();

Note, it is important to call this after the reader has been added to the layer, and after the layer has been added to the map.

Let me know how it goes!

-Graham

Thanks Graham. The

statesLayer.Reader = reader;

map1.Layers.Add(statesLayer);

statesLayer.ImportAsync();

did the trick. Thanks for the help.

no problem.

-Graham

Those calls to GetDataAsync are asynchronous, as the method name implies, so using the layerCnt field as you are trying will not work as it will get incremented to 3 before the first response even comes. You will have to use another method to identify the data returned from the data service.

-Graham

Hi

  now its working when i add one layer dynamically but when i add multiple layers the layer added last only showing up. I noticed that the GetDataCompleted event is firing only when all the layers added not when every layer added. what is the problem. I think my approach is wrong.Can you help me. I am using Geo Spatial data to create shapes. Here with i have attached the code for the setup i have tried and the service i have created.

fra97, you may also want to experiment with calling windowfit if the new layer you are trying to show is scaled or positioned differently from the layer your were previously showing. But if the layer is the same scale and position and is just more detail that the other layer, you probably wont have to adjust the window.

Oniv, if you are adding the layer programmatically like that, call WindowFit on the map control when the layer is done importing. This will adjust the map window to encompass the new content.

I need to show a map from Italy with the regions. For each Italian region should appear a cake diagram which reports the data.

By clicking on a given region I would like to show a detailed map where the municipalities are evidenced. 

Therefore, each municipality has a cake diagram as well.

Every map with the municipality of a given region has to be a “shapefile” and it would be nice to show it in a different layer. Is it possible?

How can I load a new layer and hide the previous one by a click? This is my code, When I click on map I can't see "LayerZoom" layer (my map is empty).

<igMap:XamWebMap x:Name="map1" ElementClick="map1_ElementClick">

        <igMap:XamWebMap.Layers >

            <igMap:MapLayer x:Name="LayerItalia" DataMapping="Name=CountryName; Value=BirthRate" ToolTip="Valore XML: {Value}">

                <igMap:MapLayer.Reader>

                    <igMap:ShapeFileReader Uri="Shapefiles/ITA_adm1" DataMapping="Name, Caption=NAME_1" >

                            <igMap:ShapeFileReader.CoordinateSystem>

                            <igMap:CoordinateSystem>

                                <igMap:CoordinateSystem.Projection>

                                    <igMap:SphericalMercator/>

                                </igMap:CoordinateSystem.Projection>

                            </igMap:CoordinateSystem>

                    </igMap:ShapeFileReader.CoordinateSystem>

                    </igMap:ShapeFileReader>

                </igMap:MapLayer.Reader>

</igMap:MapLayer>

</igMap:XamWebMap.Layers>

private void map1_ElementClick (object sender, Infragistics.Silverlight.Map.MapElementClickEventArgs e)

{

MapLayer statesLayer = new MapLayer();

    statesLayer.LayerName = "LayerZoom";

    ShapeFileReader reader = new ShapeFileReader();

    reader.Uri = "Shapefiles/ITA_adm0";

    DataMapping.Converter converter = new DataMapping.Converter();

    reader.DataMapping = converter.ConvertFromString("Caption=CNTRY_NAME") as DataMapping;

    statesLayer.Reader = reader;

    map1.Layers.Add(statesLayer);

    statesLayer.ImportAsync();                       

    MapLayerCollection mapCollection = map1.Layers;

    foreach (MapLayer map in mapCollection)

     {

        if (map.LayerName.Equals("LayerItalia"))

            map.IsVisible = false;

        else

            map.IsVisible = true;

     }

Can I present the data in a cake diagram?

Thanks