Selection.Combine() throwing error in 3.3 but worked in 3.1

DeniseDemone1

I have a block of code that creates a single selection object from the selections of each layer of a Group Layer. This worked fine in Pro 3.1 but now in the process of updating to 3.3 and it is failing with "ArcGIS.Core.ObjectDisconnectedException: 'This object has been previously disposed and cannot be manipulated.'" despite all objects having _disposed as false.

The original layer is a nested group layer, groups within groups. It fails when there are selections in both of the nested groups being combined.

private Selection GetSelectionFromGroupLayer(Layer inputLayer)
{
    Selection featureSelection = null;
    
    var groupLayer = (GroupLayer)inputLayer;

    IList<Layer> groupLayers = groupLayer.GetLayersAsFlattenedList().ToList();

    for (int i = 0; i < groupLayers.Count; i++)
    {
        var layer = groupLayers[i];
        if (layer is FeatureLayer)
        {
            var featureLayer = (FeatureLayer)layer;

            if (featureLayer.SelectionCount != 0)
            {
                if (featureSelection == null)
                {
                    featureSelection = featureLayer.GetSelection();
                }
                else
                {
                    Selection selection = featureLayer.GetSelection();

                    //fails here
                    featureSelection = featureSelection.Combine(selection, SetOperation.Intersection);
                }
            }

            featureLayer = null;
        }
        layer = null;
    }

    return featureSelection;
}

 Any suggestions?

UmaHarano

Hi @dd_dev 

I tried your code with a collection of nested feature layers from a file gdb and I did not see the crash. My map group layers look like this screenshot below. Can you please give me a information on your layers?