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Registered: ‎11-17-2003
Post 1 of 3


443 Views, 2 Replies
01-19-2010 03:56 AM
Need a bit of help with purging materials from a drawing. I have managed to purge all items within a named object table like layers and blocks but those in the Named Object dictionary table are confusing me a little.

Do I need to itterate through the named objects dictionarys to get the AEC_MATERIAL_DEFS dictionary then purge the contents from there?

Thanks for any help.
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Registered: ‎04-29-2006
Post 2 of 3

Re: Purging

01-19-2010 04:27 AM in reply to: dheselwood

This will purge all non referenced materials

{code}ObjectIdCollection ids = new ObjectIdCollection();
using (Transaction tr = db.TransactionManager.StartTransaction())
DBDictionary matDict = (DBDictionary)tr.GetObject(db.MaterialDictionaryId, OpenMode.ForRead, false);
foreach (DBDictionaryEntry entry in matDict)
string key = entry.Key;
if ((key != "ByBlock") && (key != "ByLayer") && (key != "Global"))
foreach (ObjectId id in ids)
DBObject obj = (DBObject)tr.GetObject(id, OpenMode.ForWrite);
}{code} Edited by: _gile on Jan 19, 2010 1:28 PM
Gilles Chanteau
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35 Posts
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Registered: ‎11-17-2003
Post 3 of 3

Re: Purging

01-19-2010 04:33 AM in reply to: dheselwood
I see, you can directly access the materialdictionaryID - I thought it would need itterating through each named dictionary to find the materials dictionary.

Thanks Gile.
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