Envelope causes access violation crash

[MarkCederholm]

I have a class for flashing geometry (attached) which worked just fine in the beta.  In the release, however, the app crashes with an access violation if the geometry is an envelope.  If I build a polygon from the envelope and use that instead, the error goes away.  Weird, huh?  Any idea why this might be happening? 

[JenniferNery]

Hi Mark,

Do you mind sharing the sample code for flashing geometry that uses Envelope? I can't seem to see attachment.

[MarkCederholm]

I can see it on my post: clsGraphicHelper.cs.zip 1.7K

[JenniferNery]

Sorry, I was looking from a expanded view of your post from the main landing page: ArcGIS Runtime SDK for .NET I didn't realize attachments are only visible from within the message.

Anyway, I used your helper class with this very simple sample. I commented out the workaround of replacing g with PolygonBuilder but I'm not able to reproduce the issue.  It seems to work without AccessViolationException. I ran the sample against the final released version 10.2.4.748

             xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013">

    <Grid x:Name="LayoutRoot"

          Background="White">

        <esri:MapView x:Name="MyMapView">

        <esri:Map >

            <esri:ArcGISTiledMapServiceLayer ServiceUri="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer" />

                <esri:GraphicsLayer ID="MyLayer" />

            </esri:Map>

        </esri:MapView>

        <StackPanel Orientation="Horizontal"

                    VerticalAlignment="Top"

                    HorizontalAlignment="Center">

            <Button Content="Flash"

                    Click="Button_Click" />

        </StackPanel>

    </Grid

        private async void Button_Click(object sender, RoutedEventArgs e)

        {

            string message = null;

            try

            {

                var geometry = await MyMapView.Editor.RequestShapeAsync(DrawShape.Envelope);

                var graphic = new Graphic() { Geometry = geometry, Symbol = new SimpleFillSymbol() };

                var layer = MyMapView.Map.Layers["MyLayer"] as GraphicsLayer;

                layer.Graphics.Add(graphic);

                clsGraphicHelper.FlashGeometry(MyMapView, geometry, geometry.Extent.GetCenter());

            }

            catch (TaskCanceledException)

            {

            }

            catch (Exception ex)

            {

                message = ex.Message;

            }

            if (!string.IsNullOrWhiteSpace(message))

                MessageBox.Show(message);

        }

[MarkCederholm]

The problem is using FlashGeometry with an Envelope on a graphics layer with a label class:

      public MainWindow()

      {

         InitializeComponent();

         var layer = MyMapView.Map.Layers["MyLayer"] as GraphicsLayer;

         TextSymbol txtSym = new TextSymbol();

         AttributeLabelClass lc = new AttributeLabelClass();

         lc.Symbol = new TextSymbol();

         lc.TextExpression = "[SomeFieldName]";

         layer.Labeling.LabelClasses.Add(lc);

         layer.Labeling.IsEnabled = true;

      }

      private async void Button_Click(object sender, RoutedEventArgs e)

      {

         var geometry = await MyMapView.Editor.RequestShapeAsync(DrawShape.Rectangle);

         //geometry = geometry.Extent; // Uncomment this line to make app crash

         clsGraphicHelper.FlashGeometry(MyMapView, geometry, geometry.Extent.GetCenter());

      }

[JenniferNery · Accepted solution]

Hi Mark,

Thank you. This is very helpful. I can reproduce the issue consistently even without your helper class. GraphicsLayer with labeling enabled crashes with AccessViolationException when it contains an Envelope geometry. I have logged an issue and we'll try to get it fixed in future releases.

[MarkCederholm]

I see this is fixed at 10.2.5.  Thanks.