Entity.UpgradeOpen

[Anonymous]

i'm having issues with upgrading an entity so i can change its layer... here's what i have

{color:#333399}Dim myLock As AutoCAD.ApplicationServices.DocumentLock = myDoc.LockDocument()
Using Trans As AutoCAD.DatabaseServices.Transaction = myDb.TransactionManager.StartTransaction
{color}

{color:#333399}Try
{color}

{color:#333399}ent.UpgradeOpen()
ent.Layer = lay
ent.DowngradeOpen()
{color}

{color:#333399}Catch ex As Exception
{color}

{color:#333399}myUtility.Prompt(vbLf & "Unable to change layer: " & ex.Message)
{color}

{color:#333399}End Try
Trans.Commit()
{color}

{color:#333399}End Using myLock.Dispose(){color}

i tried it with a transaction, without a transaction, with a document lock, without a document lock, all i get is{color:#ff0000} {color}{color:#ff0000}eInvalidOpenState{color}, i'm not sure where i'm going wrong here... any help would be more than appreciated. if you need any other info let me know.

btw, i'm getting my entity from another transaction:
{color:#333399}Dim ent As AutoCAD.DatabaseServices.Entity = CType(Trans.GetObject(obId, AutoCAD.DatabaseServices.OpenMode.ForRead), AutoCAD.DatabaseServices.Entity){color}

[Anonymous]

here's what i did that worked, not sure if it's the right way, but maybe it'll help someone like me

{color:#333399}Dim myLock As AutoCAD.ApplicationServices.DocumentLock = myDoc.LockDocument()
Using Trans As AutoCAD.DatabaseServices.Transaction = myDb.TransactionManager.StartTransaction
Try
Dim wEnt As AutoCAD.DatabaseServices.Entity = CType(Trans.GetObject(ent.ObjectId, OpenMode.ForWrite), AutoCAD.DatabaseServices.Entity)
wEnt.Layer = lay
wEnt.DowngradeOpen()
Catch ex As Exception
myUtility.Prompt(vbLf & "Unable to change layer: " & ex.Message)
End Try
Trans.Commit()
End Using
myLock.Dispose()
End Sub{color}

[Anonymous]

The reason that's happening is because the original transaction
that you opened the entity in has already ended when you call
UpgradeOpen().

You shouldn't use a DBObject once the transaction you got it from
has ended, and while there'll usually be no error in cases where
you do that with an entity that's open for read, doing it remains
a no-no.


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wrote in message news:6051997@discussion.autodesk.com...
i'm having issues with upgrading an entity so i can change its layer... here's what i have

{color:#333399}Dim myLock As AutoCAD.ApplicationServices.DocumentLock = myDoc.LockDocument()
Using Trans As AutoCAD.DatabaseServices.Transaction = myDb.TransactionManager.StartTransaction
{color}
{color:#333399}Try
{color}
{color:#333399}ent.UpgradeOpen()
ent.Layer = lay
ent.DowngradeOpen()
{color}
{color:#333399}Catch ex As Exception
{color}
{color:#333399}myUtility.Prompt(vbLf & "Unable to change layer: " & ex.Message)
{color}
{color:#333399}End Try
Trans.Commit()
{color}
{color:#333399}End Using myLock.Dispose(){color}

i tried it with a transaction, without a transaction, with a document lock, without a document lock, all i get is{color:#ff0000} {color}{color:#ff0000}eInvalidOpenState{color}, i'm not sure where i'm going wrong here... any help would be more than appreciated. if you need any other info let me know.

btw, i'm getting my entity from another transaction:
{color:#333399}Dim ent As AutoCAD.DatabaseServices.Entity = CType(Trans.GetObject(obId, AutoCAD.DatabaseServices.OpenMode.ForRead), AutoCAD.DatabaseServices.Entity){color}