求助，知道实体objectid，求实体的group的objectid

lin0799

求助，知道实体objectid，求实体的group的objectid，新学，不太熟，谢谢。

雪山飞狐_lzh

看下这里http://bbs.mjtd.com/forum.php?mod=viewthread&tid=76123的GetGroups函数

lin0799

不错，非常感谢

xuyajun1979

学习了飞狐兄的程序；使用后发现图形中编组很多时运行速度成几何级别变慢

稍作修改，恳请指正。

        /// <summary>
        ///查找编组数组,返回实体所在编组数组
        /// </summary>
        public List<Group> GetGroups(Entity ent)
        {
            //获得当前文档
            Document acDoc = Application.DocumentManager.MdiActiveDocument;
            Editor acDocED = acDoc.Editor;
            Database acCurDB = acDoc.Database;
            List<Group> gs = new List<Group>();
            DBObject Dbobj = (DBObject)ent;
            ObjectIdCollection objcol = Dbobj.GetPersistentReactorIds();
            using (Transaction acTrans = acCurDB.TransactionManager.StartTransaction())
            {
                foreach (ObjectId ObjIds in objcol)
                {
                    DBObject Pdbobj = (DBObject)acTrans.GetObject(ObjIds, OpenMode.ForRead, false);
                    if (Pdbobj.GetType().ToString().Replace("Autodesk.AutoCAD.DatabaseServices.", "") == "Group")
                    {
                        Group g = (Group)Pdbobj;
                        gs.Add(g);
                    }
                }
            }
            return gs;
        }

雪山飞狐_lzh

不错，用反应器获取是个好办法