Erase attribute inside block

[kebby70]

I've erased attribute and correctlty erased.

but remained attribute inside block.(block edit)

Please See below code.

BlockReference blkRef = (BlockReference)acTrans.GetObject(blkId, OpenMode.ForWrite);

foreach (ObjectId attId in blkRef.AttributeCollection)
{
AttributeReference attRef = (AttributeReference)acTrans.GetObject(attId, OpenMode.ForWrite);

string tag = attRef.Tag.ToUpper();
string tagValue = attRef.TextString;

 if (attRef.Tag.StartsWith("test"))
{
attRef.Erase();
}
}

[hosneyalaa]

Hi 

May add 

Comment ATTSYNC

[kebby70]

Thanks hosneyalaa, 

1. Erase attribue inside the block

2. Correctlry erased on attribute window or current drawing.

2. But Explode or Enter the block, remained attribute.

3. Block is rollbacked because the block has erased attribute if use ATTSYNC, 

I'd like to erase attribute defination entity inside block.

[kebby70]

I've solved to erase/rename attribute and it works for me.

foreach (ObjectId blkId in objectIds)
{
BlockReference blkRef = (BlockReference)acTrans.GetObject(blkId, OpenMode.ForRead);
BlockTable acBlkTbl = acTrans.GetObject(acDocDb.BlockTableId, OpenMode.ForRead, false, true) as BlockTable;
BlockTableRecord acBlkTblRec = acTrans.GetObject(acBlkTbl[blkRef.Name], OpenMode.ForRead, false, true) as BlockTableRecord;

foreach (ObjectId attId in blkRef.AttributeCollection)
{
AttributeReference attRef = (AttributeReference)acTrans.GetObject(attId, OpenMode.ForRead);

string tag = attRef.Tag.ToUpper();
if (tag.StartsWith("AAA_"))
{
attRef.UpgradeOpen();
attRef.Erase();
attRef.DowngradeOpen();
}
}

foreach (ObjectId id in acBlkTblRec)
{
DBObject obj = id.GetObject(OpenMode.ForRead);
AttributeDefinition attDef = obj as AttributeDefinition;

if (attDef != null && !attDef.Constant)
{
if (attDef.Tag.StartsWith("AAA_"))
{
attDef.UpgradeOpen();
attDef.Erase();
attDef.DowngradeOpen();
}
}
}

}