How to use Editor.SetImpliedSelection

[stefanome]

I have tried a few examples found on the forum and on the documentation, but I was never able to set the selection at the end of the command.

Below is a simple test that is supposed to keep selected only the first pre-selected entity.

You can test it by selecting a few entities and running the command. After the the command exits, only the first pre-selected entity should be selected. Instead nothing is selected.

[CommandMethod("TestRemoveItemFromPreselection", CommandFlags.UsePickSet)]
public void TestRemoveItemFromPreselection()
{
    var ed = Application.DocumentManager.MdiActiveDocument.Editor;
    var selectionResult = ed.SelectImplied();
    if (selectionResult.Status != PromptStatus.OK)
    {
        ed.WriteMessage($"selectionResult.Status: {selectionResult.Status}");
        return;
    }
    var selectionSet = selectionResult.Value;
    var ids = new ObjectIdCollection(selectionSet.GetObjectIds());
    var ids2 = new ObjectId[1];
    ids2[0] = ids[0];
    ed.SetImpliedSelection(ids2);
}

[_gile · Accepted solution]

Hi,

You have to add the CommandFlags.Redraw.

        [CommandMethod("TestRemoveItemFromPreselection", CommandFlags.UsePickSet | CommandFlags.Redraw)]
        public void TestRemoveItemFromPreselection()
        {
            var ed = Application.DocumentManager.MdiActiveDocument.Editor;
            var selectionResult = ed.SelectImplied();
            if (selectionResult.Status != PromptStatus.OK)
            {
                ed.WriteMessage($"selectionResult.Status: {selectionResult.Status}");
                return;
            }
            var ids2 = new[] { selectionResult.Value.GetObjectIds()[0] };
            ed.SetImpliedSelection(ids2);
        }