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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?

clsGraphicHelper.cs.zip

IMG20210930155613.jpg

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Accepted answers

JenniferNery

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.

All comments

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

Hi Mark,

MarkCederholm

I see this is fixed at 10.2.5. Thanks.

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