Listing features in the order they were selected

Question

This is an ArcObjects-specific version of this question: Create Array From Selected Features Based on the Order in Which They Were Selected

Is there a way to get the selected FIDs of a feature layer, selected with the interactive selection tools, in the order that the features were selected?

I've tried both enumerating and getting cursors over the map's FeatureSelection, the layer's IFeatureSelection.SelectionSet, and the IDisplayTable.DisplaySelectionSet. All returned in ascending order, not selection order.

I suppose that you could listen to feature selection events and track this yourself, but I was surprised to find out none of the above methods listed the features in selection order!

Answer 1

Can't reliably do it with an ArcGIS API. You have to listen to the Selection Events and keep track of it yourself. Sorry.

Answer 2

Edit:

As other experienced users commented, the below method is only a workaround possible in Arcgis 9.3..This functionality is not documented and may not exist in other versions..

The IEditor.EditSelection method can be used to retrieve objects in selected order to an enumerator. refer link below..

IEditor.EditSelection

The code below Worked for me in 9.3

IEditor sEditor = m_application.FindExtensionByName("ESRI Object Editor") as IEditor;
IEnumFeature enumFeature = sEditor.EditSelection;
enumFeature.Reset();

List<int> oidList = new List<int>();
IFeature selFeature = enumFeature.Next();
for (int fCount = 0; fCount < sEditor.SelectionCount; fCount++)
{
    oidList.Add(selFeature.OID);
    selFeature = enumFeature.Next();
}

List<string> strList = oidList.ConvertAll<string>(delegate(int i) { return i.ToString(); });
System.Windows.Forms.MessageBox.Show(string.Join(Environment.NewLine,strList.ToArray()));