How to select all groups whitch the groupname contains 'PART-*'

[swaywood]

Hi all:

in a drawing there are many groups.

the group name just like 'PART-1','PART-2','PART-…'

can i use a filter to select all the groups at ont time?

I am new, could you kindly give me some code to learn how to do that?

best regards

swaywood

[_gile · Accepted solution]

Hi,

You can't use a selection filter, but you can get the ObjectIdS of the entities within the groups which names match a specified pattern.

SelectByGroupName(db, "PART-*");

        private ObjectIdCollection SelectByGroupName(Database db, string pattern)
        {
            ObjectIdCollection result = new ObjectIdCollection();
            using (Transaction tr = db.TransactionManager.StartOpenCloseTransaction())
            {
                DBDictionary NOD = (DBDictionary)tr.GetObject(db.NamedObjectsDictionaryId, OpenMode.ForRead);
                DBDictionary groups = (DBDictionary)tr.GetObject(NOD.GetAt("ACAD_GROUP"), OpenMode.ForRead);
                foreach (DBDictionaryEntry entry in groups)
                {
                    if (Utils.WcMatchEx(entry.Key, pattern, true))
                    {
                        Group group = (Group)tr.GetObject(entry.Value, OpenMode.ForRead);
                        foreach (ObjectId id in group.GetAllEntityIds())
                        {
                            result.Add(id);
                        }
                    }
                }
                tr.Commit();
            }
            return result;
        }

[swaywood]

hi,gile:
thank you so much!
I'll try it.
best regards.
swaywood