eLockViolation error code creating a new layer and make it work from push button

[corra76]

Hello,

I wrote some code in VB .NET 2010 getting started from Kean Walmsley project to create a new layer. I did it working directly from code and not using a command line as he did.

http://through-the-interface.typepad.com/through_the_interface/2010/01/creating-an-autocad-layer-usi...

The problem is that the same code works if I call it directly inside the application code, but doesn't if I throw it from a push button.

I get the eLockViolation error code.

I don't understand why it doesn't works and how cold I solve the problem.

Does anyone have any suggestion?

Thank you

Corra

[kob4lt · Accepted solution]

I think you must use DocumentLock class before you make any changes to database

Like this

using (DocumentLock docLock = doc.LockDocument())

{

... code where you make changes to db

}

[corra76]

OK, it works!

It's not completely clear why there are some cases it works also without lockDocument...

Il'' think about it.

Thank you very much!

Corra

[kdub_nz]

You'll find that routines run from the 'Application' requires document locking ... modeless dialog, palettes, COM server and commands registered using the CommandMethod attribute 'CommandFlags.Session' run in Application mode.

[xaotix]

solved my problem! thx!