private List <ObjectId> GetBlockReferences(ObjectId blockId)
{
List <ObjectId> result = null;
using (Transaction tr = _wdb.TransactionManager.StartTransaction())
{
BlockTableRecord btr = (BlockTableRecord)tr.GetObject(blockId, OpenMode.ForRead);
BlockTable bt = (BlockTable)tr.GetObject(_wdb.BlockTableId, OpenMode.ForRead);
ObjectId modelId = ((BlockTableRecord)tr
.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead)).ObjectId;
result = btr.GetAllBlockReferenceIds(true)
.Select(n => (BlockReference)tr.GetObject(n, OpenMode.ForRead))
.Where(n => n.OwnerId == modelId)
.Select(n => n.ObjectId)
.ToList();
tr.Commit();
}
return(result);
}
/// <summary>
/// Gets all block reference ids.
/// </summary>
/// <param name="btr">The BTR.</param>
/// <param name="directOnly">if set to <c>true</c> [direct only].</param>
/// <param name="forceValidity">if set to <c>true</c> [force validity].</param>
/// <returns></returns>
public static ObjectIdCollection GetAllBlockReferenceIds(this BlockTableRecord btr, bool directOnly,
bool forceValidity)
{
return(btr.GetAllBlockReferenceIds(btr.Database.TransactionManager.TopTransaction, directOnly, forceValidity));
}