topic Re: Database.AddDBObject vs. TransactionManager.AddNewlyCreatedDBObject in .NET Forum

Database.AddDBObject vs. TransactionManager.AddNewlyCreatedDBObject

kelidesign — Thu, 18 Apr 2024 10:16:28 GMT

Is there any difference in usage between Database.AddDBObject and TransactionManager.AddNewlyCreatedDBObject? I recently made a mistake (if there are two identically defined methods, one is a native method and the other is an extended method, no prompt will be given...), I am considering writing a demo to analyze and verify, and submit it to Microsoft, think about design rationality).

Because I had never used AddDBObject and had no impression of it, I accidentally wrote an extension method with the same name and the same parameter list, causing an error in the method I wanted to execute.

Share my method:

public static void AddDBObject(this Database db, DBObject obj) { if (!db.IsValid()) throw new InvalidDataException(nameof(db)); if (!obj.IsValid()) throw new InvalidDataException(nameof(obj)); db.GetTopTransaction().AddNewlyCreatedDBObject(obj, true); }

Re: Database.AddDBObject vs. TransactionManager.AddNewlyCreatedDBObject

ActivistInvestor — Thu, 18 Apr 2024 13:09:34 GMT

AddDBObject() adds an object to the Database.

AddNewlyCreatedDBObject() adds an object to the transaction.

One has nothing to do with the other.

You rarely need to call AddDBObject() because adding a DBObject to an owner (e.g., BlockTableRecord.AppendEntity) also adds it to the Database.

Re: Database.AddDBObject vs. TransactionManager.AddNewlyCreatedDBObject

kelidesign — Fri, 19 Apr 2024 01:36:14 GMT

I still can't intuitively feel the difference and when to use it. It would be great if I could explain a specific example. Thanks.

Re: Database.AddDBObject vs. TransactionManager.AddNewlyCreatedDBObject

daniel_cadext — Fri, 19 Apr 2024 01:52:44 GMT

AddDBObject appends an object to the database, but it has no owner, orphaned objects may not be saved. So, you should avoid AddDBObject unless you have a specific reason to use it.

BlockTableRecord.AppendEntity appends an object to the database AND applies an owner, which in this case, is the BlockTableRecord, such as modelspace or paperspace

AddNewlyCreatedDBObject is a transaction, this for more for memory management, undo redo

Re: Database.AddDBObject vs. TransactionManager.AddNewlyCreatedDBObject

ActivistInvestor — Fri, 19 Apr 2024 16:19:44 GMT

I would suggest finding a better language translator.

Re: Database.AddDBObject vs. TransactionManager.AddNewlyCreatedDBObject

kelidesign — Mon, 22 Apr 2024 15:05:14 GMT

Sorry, it may have something to do with the simplicity of my expression. I will pay attention to it, thank you.