topic Re: Point graphics not displaying with renderer in ArcGIS API for Silverlight Questions

Point graphics not displaying with renderer

EricElder — Fri, 08 Jun 2012 15:21:26 GMT

I have a graphics layer that has graphics populated, but I am unable to see the graphics in the map. I know the graphics exist because it is possible to zoom to selected graphics. I am currently using the same working renderer methodology for lines and polygons, but it is not working for points. The point graphics layer does show the symbol correctly in the legend, just nothing is showing up in the map.

<esri:SimpleRenderer x:Key="SelectRendererPoint">
    <esri:SimpleRenderer.Symbol>
        <esri:MarkerSymbol>
            <esri:MarkerSymbol.ControlTemplate>
                <ControlTemplate>
                    <Ellipse x:Name="Element" Width="8" Height="8" Fill="blue" Stroke="blue" HorizontalAlignment="Center" VerticalAlignment="Center">
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="SelectionStates">
                                    <VisualState x:Name="Unselected" />
                                    <VisualState x:Name="Selected" >
                                        <Storyboard>
                                            <ColorAnimation Storyboard.TargetName="Element" 
       Storyboard.TargetProperty="(Ellipse.Fill).(SolidColorBrush.Color)"
       To="#99FFFF00" Duration="00:00:0.25"/>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                    </Ellipse>
                </ControlTemplate>
            </esri:MarkerSymbol.ControlTemplate>
        </esri:MarkerSymbol>
    </esri:SimpleRenderer.Symbol>
</esri:SimpleRenderer>

<esri:GraphicsLayer ID="MyGraphicsLayerPoints" Renderer="{StaticResource SelectRendererPoint}"></esri:GraphicsLayer>

What would cause the point graphics layer that contains graphics to not show the renderer symbology?

Re: Point graphics not displaying with renderer

JenniferNery — Fri, 10 Dec 2021 20:14:24 GMT

I tried your renderer with the following map and it worked for me.

  <esri:Map x:Name="MyMap" WrapAround="True" Background="White">
   <esri:ArcGISTiledMapServiceLayer ID="PhysicalTiledLayer" 
                  Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"/>
   <esri:GraphicsLayer ID="MyGraphics" Renderer="{StaticResource SelectRendererPoint}" MouseLeftButtonDown="GraphicsLayer_MouseLeftButtonDown">
    <esri:GraphicsLayer.Graphics >
     <esri:Graphic>
      <esri:MapPoint X="-140.9" Y="63.391">
       <esri:Geometry.SpatialReference >
        <esri:SpatialReference WKID="4326" />
       </esri:Geometry.SpatialReference>
      </esri:MapPoint>
     </esri:Graphic>
    </esri:GraphicsLayer.Graphics>
   </esri:GraphicsLayer>
  </esri:Map>

  private void GraphicsLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs e)
  {
   e.Graphic.Selected = !e.Graphic.Selected;
  }

Did you set your Graphic.Geometry.SpatialReference? Is GraphicsLayer.Visible? Double check that you've associated the correct symbol with GraphicsLayer that has Point geometry.

Re: Point graphics not displaying with renderer

EricElder — Mon, 18 Jun 2012 20:51:52 GMT

Well I found my mistake. I had some C# code assigning the graphics into the wrong graphics layer. Symbology works fine now.