[AutoCAD.Net]获取从ExplodeToOwnerSpace API创建的实体 （块参照分解）

//汉字部分参考

//由Virupaksha Aithal提供

//您可以使用数据库反应器来识别由于“ExplodeToOwnerSpace”调用而创建的实体。请参阅下面的代码，它在调用“ExplodeToOwnerSpace”之前添加一个“ObjectAppended”事件回调。调用“ExplodeToOwnerSpace”后，事件回调将被删除。“ObjectIdCollection”填充在“ObjectAppended”回调中，可用于确定在“ExplodeToOwnerSpace”API中添加的对象

static ObjectIdCollection ids = new ObjectIdCollection （）;

[CommandMethod("ExplodeToOwnerSpace")]

public static void ExplodeToOwnerSpace()

{

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

    Editor ed = doc.Editor;

 

    PromptEntityOptions options =

              new PromptEntityOptions("\nSelect block reference");

    options.SetRejectMessage("\nSelect only block reference");

    options.AddAllowedClass(typeof(BlockReference), false);

 

    PromptEntityResult acSSPrompt = ed.GetEntity(options);

 

    using (Transaction tx =

                        db.TransactionManager.StartTransaction())

    {

        BlockReference blockRef = tx.GetObject(acSSPrompt.ObjectId,

                               OpenMode.ForRead) as BlockReference;

        //add event

        ids.Clear();

        db.ObjectAppended +=

                        new ObjectEventHandler(db_ObjectAppended);

        blockRef.ExplodeToOwnerSpace();

        //remove event

        db.ObjectAppended -=

                        new ObjectEventHandler(db_ObjectAppended);

 

        foreach (ObjectId id in ids)

        {

            //get each entity....

            ed.WriteMessage("\n" + id.ToString());

        }

 

        tx.Commit();

    }

}

 

static void db_ObjectAppended(object sender, ObjectEventArgs e)

{

    //add the object id

    ids.Add(e.DBObject.ObjectId);

}