topic Re: Utilizing SelectionSet on non-opened drawings in .NET Forum

Utilizing SelectionSet on non-opened drawings

Anonymous — Thu, 30 Aug 2012 20:02:16 GMT

Hi, I am trying to create a function or class can be used with the MdiActiveDocument and also with the external Database. In order words the function or class should be able to access current Document and also non-opened Databases.

My difficulty is accessing the non-opened drawings and utilizing the SelectionSet to select blocks with SelectionFilter like I could do with a MdiActiveDocument.

I would like to know if what I am trying to do is even possible, or would I have physically open the drawing to have the ability to utilize SelectionSet and filters.

Thank you in advance,

-Jay

Re: Utilizing SelectionSet on non-opened drawings

Alfred.NESWADBA — Fri, 31 Aug 2012 15:41:50 GMT

Hi,

>> I would like to know if what I am trying to do is even possible

No, as the SelectionSet is part if the Editor-Namespace it's only available for drawings in the editor.

To get the same functionality in drawings not opened in the editor you have to scan through the blocktables (ModelSpace and Layouts).

One help to that is that the ObjectID allready knows the DXF-Name of the object so it is not necessary to open each object (via transaction or via open). So to scan for Lines you can use

if myObjectId.ObjectClass.DxfName = "LINE" then

The other option to look for BlockReferences is to find the BlockTableRecord with the name you look for and then use

tBlockTabRec.GetBlockReferenceIds(directOnly As Boolean, forceValidity As Boolean)

to get the ObjectID's from all references inserted in the drawing.

- .alfred -

Re: Utilizing SelectionSet on non-opened drawings

DiningPhilosopher — Fri, 31 Aug 2012 16:35:44 GMT

Try setting the HostApplicationServices.WorkingDatabase property to the database you want to do the filtered selection on just before you call GetSelection), and immediately set that same property to the active document's database as soon as GetSelection() returns.

Re: Utilizing SelectionSet on non-opened drawings

Anonymous — Sun, 02 Sep 2012 04:08:52 GMT

Thank you DiningPhilosopher and Alfred,

I ended useing something very similar to your proposal: Database.CurrentSpaceId. Then just iterate all block in that space for the block name. That worked very well.

Again, thank you both very much.

-Jay

Re: Utilizing SelectionSet on non-opened drawings

Alfred.NESWADBA — Sun, 02 Sep 2012 08:23:37 GMT

Hi,

I just learned something, thank you for the tip! (even my pessimistic feeling if that works really save raises up, but I will test).

Thx, - alfred -