TextBlock in Informationlayer Polygon

[Rieni De Rijke]

In our Radmap we have an InformationLayer and a SpatialDataReader.
We display regions as polygons.
How can we use a TextBlock or a label to show the RegionName in the polygon.
We tried making a DataTemplate but it would not work...

<telerik:InformationLayer x:Name="MyLayer">
                    
   <telerik:InformationLayer.Reader>
        <telerik:SqlGeospatialDataReader x:Name="MyReader"  Source="{Binding}" 
                                         GeospatialPropertyName="RegionGeometry" ToolTipFormat="RegionName">
        </telerik:SqlGeospatialDataReader>
   </telerik:InformationLayer.Reader>
					
   <telerik:InformationLayer.ShapeFill>
					    <telerik:MapShapeFill Fill="#50CCFF66" Stroke="Orange" StrokeThickness="3" />
    </telerik:InformationLayer.ShapeFill>
				
</telerik:InformationLayer>

[Andrey]

Hello Rieni De Rijke,

You can use the CaptionLocation and the CaptionTemplate properties of MapShape to set the region name. It could be done using the InformationLayer.PreviewReadCompleted event. The sample code is below.

<Window x:Class="ShapeCaption.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <telerik:ExtendedDataConverter x:Key="ExtendedDataConverter" />
        <DataTemplate x:Key="CaptionTemplate">
            <Grid Background="Yellow" telerik:MapLayer.HotSpot="0.5, 0.5">
                <TextBlock Foreground="Blue" Text="{Binding Path=Data, Converter={StaticResource ExtendedDataConverter}, ConverterParameter=STATE_NAME}"/>
            </Grid>
        </DataTemplate>
    </Window.Resources>
    <Grid>
        <telerik:RadMap x:Name="RadMap1">
            <telerik:RadMap.Provider>
                <telerik:EmptyProvider />
            </telerik:RadMap.Provider>
            <telerik:InformationLayer x:Name="MyLayer">
                <telerik:InformationLayer.Reader>
                    <telerik:SqlGeospatialDataReader x:Name="MyReader" Source="{Binding}" GeospatialPropertyName="RegionGeometry" ToolTipFormat="RegionName" PreviewReadCompleted="PreviewReadCompleted">
                    </telerik:SqlGeospatialDataReader>
                </telerik:InformationLayer.Reader>
            </telerik:InformationLayer>
        </telerik:RadMap>
    </Grid>
</Window>

using System.Windows;
using Telerik.Windows.Controls.Map;

namespace ShapeCaption
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void PreviewReadCompleted(object sender, Telerik.Windows.Controls.Map.PreviewReadShapesCompletedEventArgs eventArgs)
        {
            if (eventArgs.Error == null)
            {
                DataTemplate template = this.Resources["CaptionTemplate"] as DataTemplate;
                foreach (MapShape shape in eventArgs.Items)
                {
                    Location location = shape.GeographicalBounds.Center;

                    shape.CaptionLocation = location;
                    shape.CaptionTemplate = template;
                }
            }
        }
    }
}

All the best,
Andrey Murzov
the Telerik team

[Rieni De Rijke]

It works!
Thank you very much!