How to remove RXClasses (custom objectdbx) from DWG file

[Anonymous]

Using .Net API how can we remove RXClasses (custom objectdbx) from DWG file. I have purged all the instances of those RXClasses but if I look at at the DXFOUT of the file, I can still see those classes. Looks like in ObjectARX there is deleteAcRxClass() function to remove your custom classes from the AcRx runtime tree so essentially I want to know how to do the same thing in .NET.

[JamesMaeding]

all I mean is nuke the code starting with "class" up to next "class" like in this snippet:

280
     0
281
     0
  0
CLASS
  1
AEC_REFEDIT_STATUS_TRACKER
  2
AecDbRefEditStatusTracker
  3
AecArchBase70|Product Desc: Autodesk Architectural Desktop 2007 |Company: Autodesk,Inc. |WEB Address: www.autodesk.com
 90
      129
 91
        0
280
     0
281
     0
  0
CLASS
  1
NPOCOLLECTION
  2
AcDbImpNonPersistentObjectsCollection
  3

I did not try that, but seems too easy if if works.

This is why I love text files, you can fix them instead of going through someone else's interface.

[Alexander.Rivilis]

@JamesMaeding

I'm sorry but you do not understand me. If I have a dwg-file and I save it as a dxf-file, it can then not open in AutoCAD or it may not fully match the original dwg-file. So I would not recommend working with dxf files.

[Anonymous]

Agreed...

[JamesMaeding]

@Alexander.Rivilis

oh, I definitely agree with that. Dxf's are junk IMO.

The idea of a text file following a schema is not junk though, and I wish there was such a schema, though it would be really bulky with xml tags.

The same pattern happens for civil engineering data. We have LandXML, and its ok, but underdeveloped in terms of what we need.