Question about Handles
Not exactly, but you can exchange a database resident entity with a non database resident entity so that the non database resident entity gets the handle of the database resident entityy using the HandHoverTo method.
This must be done outside any standard transaction using Open/Close methods or an OpenCloseTransaction.
Here's a simple example which "erases" a circle and "reuse" the circle handle for a newly created arc.
#pragma warning disable 0618
public static void ReplaceCircleWithArc(ObjectId circleId, double startAngle, double endAngle)
{
if (circleId.ObjectClass != RXObject.GetClass(typeof(Circle)))
return;
using (var circle = (Circle)circleId.Open(OpenMode.ForWrite))
using (var arc = new Arc(circle.Center, circle.Radius, startAngle, endAngle))
{
arc.Normal = circle.Normal;
circle.HandOverTo(arc, true, true);
}
}
}
#pragma warning restore 0618
EDIT:
OOPS! I did not see this message was in the LISP forum (thaught it was .NET one).
I'm afraid this is not possible with LISP
