topic Re: GraphicsLayer Legend Alias Names in ArcGIS API for Silverlight Questions

GraphicsLayer Legend Alias Names

adamestrada — Mon, 16 May 2011 16:53:24 GMT

All,

My app has several Graphics layers that are generated dynamically based on specific query results and whatnot.

My esri:Map container looks like this:

                <esri:Map x:Name="Map" Loaded="Map_Loaded" Extent="-15000000,2000000,-7000000,8000000" ExtentChanged="Map_ExtentChanged" MouseMove="Map_MouseMove"
                          Grid.Row="1" Grid.Column="0">

                    <esri:ArcGISTiledMapServiceLayer ID="AGOLayer" Visible="True"  
                        Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer" />

                    <esri:WmsLayer ID="Nexrad" Opacity="0.5" SkipGetCapabilities="True" Initialized="WmsLayer_Initialized"  Visible="True" />

                    <esri:GraphicsLayer ID="ContextGraphicsLayer" x:Name="TestLayer"></esri:GraphicsLayer>

                    <esri:GraphicsLayer ID="GeocodeResultsGraphicsLayer">
                        <esri:GraphicsLayer.MapTip>
                            <Grid>
                                <Border BorderBrush="Black" CornerRadius="10"  BorderThickness="1" Background="#FFFFE300" />
                                <StackPanel Orientation="Vertical" Margin="5">
                                    <TextBlock Text="{Binding [DisplayName]}" HorizontalAlignment="Left" />
                                </StackPanel>
                            </Grid>
                        </esri:GraphicsLayer.MapTip>
                    </esri:GraphicsLayer>
                    <esri:GraphicsLayer ID="SelectionGraphicsLayer" 
                                        MouseEnter="GraphicsLayer_MouseEnter" 
                                        MouseLeave="GraphicsLayer_MouseLeave" />

                </esri:Map>

In my Legend the names of the GraphicsLayers are based on the ID and not not really all that appealing. eg. SelectionGraphicsLayer, GeocodeResultsGraphicsLayer and ContextGraphicsLayer. My question is can I change or alias these names when they are displayed in the Legend?

Thanks,
Adam

Re: GraphicsLayer Legend Alias Names

DominiqueBroux — Sat, 11 Dec 2021 14:06:53 GMT

In my Legend the names of the GraphicsLayers are based on the ID and not not really all that appealing. eg. SelectionGraphicsLayer, GeocodeResultsGraphicsLayer and ContextGraphicsLayer. My question is can I change or alias these names when they are displayed in the Legend?

You can hook up an handler to the Legend.Refreshed event and change the Labels in this handler.
Something like:

 
private void Legend_Refreshed(object sender, Legend.RefreshedEventArgs e)
{
    switch(e.LayerItem.Layer.ID)
    {
        case "ContextGraphicsLayer":
            e.LayerItem.Label = "Contextual result";
            break;
        case "GeocodeResultsGraphicsLayer":
            e.LayerItem.Label = "Geocode result";
            break;
    }
}

You can also remove the legend item if you'd rather not to see it in the legend.

Re: GraphicsLayer Legend Alias Names

adamestrada — Sat, 11 Dec 2021 14:06:55 GMT

Thanks Dominique,

That worked to change the display name but to make the layer completely invisible I get the following error.

Property or indexer 'ESRI.ArcGIS.Client.Toolkit.Primitives.LayerItemViewModel.IsVisible' cannot be assigned to -- it is read only

                case "GeocodeResultsGraphicsLayer":
                    e.LayerItem.IsVisible = false;
                    //e.LayerItem.Label = "Geocode result";
                    break;

Why would the visibility be read only?

Adam

Re: GraphicsLayer Legend Alias Names

DominiqueBroux — Tue, 17 May 2011 16:12:18 GMT

IsVisible is a read-only property because it returns the current visibility of the layer or sublayer by taking care of the current scale and of the visibility of the parent hierarchy (for a sublayer).

The writeable property is called 'IsEnabled', so e.LayerItem.IsEnabled = false; should work.
You can also set directly the 'Visible' property of the layer : e.LayerItem.Layer.Visible = false;