AutoCAD Plant3d 数据读取(类似Revit的Lookup) (一)

背景

在Plant3d的开发过程中，发现缺少一个类似revit的信息查看工具，同时做一些数据验证

思路

• 启动拾取

Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
PromptEntityResult res = ed.GetEntity("\n选择一个实体: ");

• 读取信息

            using (Transaction transaction = dwg.TransactionManager.StartTransaction())
            {
                DBObject ent = transaction.GetObject(res.ObjectId, OpenMode.ForRead);
                if (ent == null)
                {
                    return string.Empty;
                }
                if (res.ObjectId.ObjectClass.IsDerivedFrom(RXObject.GetClass(typeof(Pipe))))
                {
                    return Read(ent as Pipe);
                }
                else if (res.ObjectId.ObjectClass.IsDerivedFrom(RXObject.GetClass(typeof(Equipment))))
                {
                    return Read(ent as Equipment);
                }

                return "未识别对象";
            }