How to reject layer deleting

Anonymous — Fri, 17 Aug 2012 11:47:42 GMT

I want to lock my layer from deleting.

I did it as for object:

    public class NonErasableLayer : ObjectOverrule
    {
        public NonErasableLayer()
        {
            this.SetCustomFilter();
        }

        protected override void Dispose(bool value)
        {
            this.SetNoFilter();
            base.Dispose(value);
        }

        public override bool IsApplicable(Autodesk.AutoCAD.Runtime.RXObject overruledSubject)
        {
            if (overruledSubject == null)
                return false;

return (overruledSubject is LayerTableRecord);
}

        public override void Erase(DBObject dbObject, bool erasing)
        {
            if (dbObject is LayerTableRecord)
            {
                Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage("\nLAYER IS LOCKED.\n");
            }

            throw new Autodesk.AutoCAD.Runtime.Exception(ErrorStatus.NotApplicable);
        }
    }

Then I set overrule for Drawable objects:

ObjectOverrule.AddOverrule(RXClass.GetClass(typeof(Drawable))...

When I run it I saw my message from Erase method but... layer is deleted.

This method works fine for any objects as Line or Circle, but doen't work for layer.

How I can reject layer deleting?

Thanks,

Pavel.

Re: How to reject layer deleting

jeff — Fri, 17 Aug 2012 19:19:48 GMT

In link below is a similar thread and was to store the LayerTableRecord's ObjectIDs as Hard Pointers.

Would use the advice to store in Owners ExtensionDictionary

http://www.theswamp.org/index.php?topic=41870.msg469858#msg469858

topic Re: How to reject layer deleting in .NET Forum

How to reject layer deleting

Re: How to reject layer deleting