public void CreateCircle() { Editor ed = Application.DocumentManager.MdiActiveDocument.Editor; //新建一个圆 int count = 5; while (count-- > 1) { Point3d pt1 = new Point3d(10 + 100 * count, 10 + 100 * count, 0); double radius = 10 * count; Circle cc = CreateEntityOperation.CreateCircle(pt1, radius); DBOperation.AddToModelSpace(cc); } ed.UpdateScreen(); }