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以下代码展示如何遍历 AutoCAD 文档中的组。

Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;

using (Transaction tr = db.TransactionManager.StartTransaction())
{
    DBDictionary groups = tr.GetObject(db.GroupDictionaryId,
        OpenMode.ForRead) as DBDictionary;

    // 遍历所有的组
    foreach (DBDictionaryEntry entry in groups)
    {
        Group group = tr.GetObject(entry.Value, OpenMode.ForRead) as Group;
        ObjectId[] ids = group.GetAllEntityIds();

        // 遍历组下的图元
        foreach (ObjectId oid in ids)
        {
            Entity entity = tr.GetObject(oid, OpenMode.ForRead) as Entity;
        }

        doc.Editor.WriteMessage("Group: {0} 包含 {1} 个图元\n", group.Name, ids.Length);
    }

    tr.Commit();
}

参考文章：


Iterating through the group dictionary