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Valued Contributor
stuartnathan
Posts: 70
Registered: ‎02-17-2005
Message 1 of 7 (956 Views)
Accepted Solution

Operation is not valid due to the current state of the object.

956 Views, 6 Replies
01-05-2012 02:22 PM

my code is:

      Dim AcadDoc As Document = Application.DocumentManager.MdiActiveDocument
      Dim CurDb As Database = AcadDoc.Database
      Dim lt As LayerTable = DirectCast(tr.GetObject(CurDb.LayerTableId, OpenMode.ForRead), LayerTable)

 if fails on last line with error:-

Operation is not valid due to the current state of the object.

 

This works elsewhere.

 

Any ideas as to where to start looking?

My suggestion was going to be that it sounds like the kind of error you would get when trying to access the database from inside an eventhandler, when the database was not yet available.  Not sure what your purpose is, or if this will work for you, but one solution to that problem is to use the EventHandler to send a command to the stack (I use a P-Invoke of ads_queueexpr), which will execute as soon as AutoCAD has finished opening the drawing, and returned to a quiescent state.

*Expert Elite*
Alfred.NESWADBA
Posts: 9,216
Registered: ‎06-29-2007
Message 2 of 7 (953 Views)

Re: Operation is not valid due to the current state of the object.

01-05-2012 02:25 PM in reply to: stuartnathan

Hi,

 

my guess is:

your transaction "tr" is based on another database (and not based on CurDB)

 

- alfred -

-------------------------------------------------------------------------
Alfred NESWADBA
Ingenieur Studio HOLLAUS ... www.hollaus.at
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Valued Contributor
stuartnathan
Posts: 70
Registered: ‎02-17-2005
Message 3 of 7 (943 Views)

Re: Operation is not valid due to the current state of the object.

01-05-2012 03:28 PM in reply to: Alfred.NESWADBA

Actually no.

 

I didn't mean to confuse you by simplifying the code but

      AcadDoc = DocMan.MdiActiveDocument

      CurDb = AcadDoc.Database

are set when the DocumentActivated event is executed.

 

But I will look at my code again to see if this could be correct.

*Expert Elite*
chiefbraincloud
Posts: 753
Registered: ‎02-13-2008
Message 4 of 7 (937 Views)

Re: Operation is not valid due to the current state of the object.

01-05-2012 04:49 PM in reply to: stuartnathan

My suggestion was going to be that it sounds like the kind of error you would get when trying to access the database from inside an eventhandler, when the database was not yet available.  Not sure what your purpose is, or if this will work for you, but one solution to that problem is to use the EventHandler to send a command to the stack (I use a P-Invoke of ads_queueexpr), which will execute as soon as AutoCAD has finished opening the drawing, and returned to a quiescent state.

Dave O.                                                                  Sig-Logos32.png
Valued Mentor
KerryBrown
Posts: 271
Registered: ‎11-29-2008
Message 5 of 7 (925 Views)

Re: Operation is not valid due to the current state of the object.

01-06-2012 12:14 AM in reply to: stuartnathan

>> This works elsewhere.

 

>> Any ideas as to where to start looking?


 

I'd be looking at what is different since you used it 'elsewhere'  

... otherwise more information is required.

//-------------------------------------------------------

class keyThumper<T> : Lazy<T>;      another  Swamper

Valued Contributor
stuartnathan
Posts: 70
Registered: ‎02-17-2005
Message 6 of 7 (921 Views)

Re: Operation is not valid due to the current state of the object.

01-06-2012 02:11 AM in reply to: chiefbraincloud

Most of my code is in a common Module.

I also have a Command Class that loads forms, which raise events. I had started a transaction in the event and then called the Module code.

Now I start the transaction in the Module and it now works!

 

Thanks - you saved me a lot of time!

 

Valued Contributor
spanqy
Posts: 90
Registered: ‎11-13-2006
Message 7 of 7 (633 Views)

Re: Operation is not valid due to the current state of the object.

04-18-2012 04:30 PM in reply to: stuartnathan

This error happened to me under the following scenario, which I was able to fix:

 

I was iterating through block table records (OpenMode.ForRead) within a "Using" transaction block.  When a block matched certain criteria, I would call btr.UpgradeOpen, apply my modifications, then call tr.Commit.  This worked for the first block that matched the criteria  but not for the NEXT block that did, which failed with "Operation is not valid due to the current state of the object."

 

This was probably because the transaction had already been commited.  So to handle it, I added a boolean flag and set it to true where I had previously call tr.Commit.  I then checked for True AFTER finishing iterating through all block table records, and then called tr.commit.

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