V12.Net API: How to get and entity by its handle?

Arno Van Eeuwen

Hello all,

 

I've  started to play around with the .NET API in V12 (using C#) and run into following challenge:

How do I get reference to an entity if I know its handle?

Actually I look for a specific Paperspace Viewport (by its handle)

Do I have to cycle the Paperspace block (using a BlockTableRecordEnumerator) until I find an entity with the correct handle or is there a quicker way?

Huge amount to (re) discover after 10 years playing with COM!

T.I.A.

Arno van Eeuwen

 

Arno Van Eeuwen

Hmmm, never mind. This seems to do it.

 

http://through-the-interface.typepad.com/through_the_interface/2007/02/getting_access_.html

Arno Van Eeuwen

On with the .NET quest...

 

 Document doc = AcAp.Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor editor = doc.Editor;  try {   long ln = Convert.ToInt64(rxConfig.Handle, 16);   Handle hn = new Handle(ln);   ObjectId id = db.GetObjectId(false, hn, 0);             using (Transaction tr = db.TransactionManager.StartTransaction())   {      Entity ent = (Entity)tr.GetObject(id, OpenMode.ForRead);

      Some more code here....    }       

Now in my case the entity I try to acces using the above code lays on a locked layer.

The GetObject fails....

So: how to make sure to unlock the layer of an entity when I only know it's ID?

TIA

 

Its_Alive

Transaction::GetObject has an overload, forceOpenOnLockedLayer.... the signature should be

 

public virtual DBObject GetObject(ObjectId id, OpenMode mode, bool openErased, bool forceOpenOnLockedLayer);

 

give that a whirl and see what happens

Cheers!

Arno Van Eeuwen

Why are you not in the pub celebrating your birthday? ;-)

Ah, you brought you own from Belgium!

Thanks Dan, another mistery solved. As I said, loads to discover.....

 

 

Its_Alive

I'm headed to the pub now : )