Open state of block reference

Anonymous — Mon, 04 Nov 2019 15:04:26 GMT

Hi,

The following method erases blocks from a drawing database accesses, adds new blocks--including a block that just has attribute definitions (adTBAtt)--and then uses those attribute definitions to add corresponding attribute references (arTBAtt) to to the block reference (brTBAtt2). When I try to UpgradeOpen, it throws an eNotOpenForWrite exception. When I leave out UpgradeOpen, it throws an eInvalidOpenState exception. BTW I have to define brTBAtt2 even though I already defines that exact same block reference earlier (brTBAtt), because brTBAtt.BlockTransform has an exception (learned that from stepping through the code a checking the variables). What am I doing wrong? I have also attached AttachTBAttributeDef. Thank you!

private static Boolean AddAttRef(Database db, string strLayout, string strSize, string strVDocNr, BlockReference brTB)
        {
            int intTBAtt = brTB.AttributeCollection.Count;
            string[] str_TBTag = new string[intTBAtt];
            string[] str_TBAttVal = new string[intTBAtt];
            string strFrame = "Z_" + strSize.ToUpper() + "_FRAME";
            (str_TBTag, str_TBAttVal) = EraseFrameAndTB(db, strSize, brTB, strLayout, strFrame);

            string strTemp = "Wdi" + strSize.ToLower() + "1";
            BlockReference brTemp = AttachFrameAndTB(db, strSize, strLayout, strTemp);

            String strTBName = "WDC-TBI1";
            BlockReference brTBAtt = AttachTBAttributeDef(db, strLayout, strTBName);

            using (Transaction tr = db.TransactionManager.StartTransaction())
            {

                BlockReference brTBAtt2 = AcadHelper.GetBlockReferenceFromPrefix(strTBName,strLayout,db);
                BlockTableRecord btrTBAtt = (BlockTableRecord)tr.GetObject(brTBAtt2.BlockTableRecord, OpenMode.ForWrite);

                if (btrTBAtt.HasAttributeDefinitions)
                {
                    foreach (ObjectId oidTBAtt2 in btrTBAtt)
                    {
                        DBObject dboTBAtt = tr.GetObject(oidTBAtt2, OpenMode.ForRead) as DBObject;
                        if (dboTBAtt is AttributeDefinition)
                        {
                            AttributeDefinition adTBAtt = tr.GetObject(oidTBAtt2, OpenMode.ForRead) as AttributeDefinition;
                            if ((adTBAtt != null) && !adTBAtt.Constant)
                            {
                                using (AttributeReference arTBAtt = new AttributeReference())
                                {
                                    arTBAtt.SetAttributeFromBlock(adTBAtt, brTBAtt2.BlockTransform);
                                    arTBAtt.Position = adTBAtt.Position.TransformBy(brTBAtt2.BlockTransform);
                                    arTBAtt.TextString = "I AM GROOT!";

                                    // Following  line throws eInvalidOpenState exception
                                    brTBAtt2.UpgradeOpen();
                                    // If last line is commented out, following line throws eNotOpenForWrite exception
                                    brTBAtt2.AttributeCollection.AppendAttribute(arTBAtt); 
                                    tr.AddNewlyCreatedDBObject(arTBAtt, true);
                                }
                            }
                        }
                        
                    }
                }
                tr.Commit();
            }

            //AddPartDataToBOM(db, strLayout);

            return true;
        }

private static BlockReference AttachTBAttributeDef(Database db, string strLayout, string strTBName)
        {
            BlockReference brTBAtt = null;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                Database dbTBAtt = new Database(false, true);
                string strPath = Path.GetDirectoryName(AcadHelper.FindFile(strTBName + ".DWG"));
                Point3d p3dIns = new Point3d(0, 0, 0);
                string strFileName = strPath + "\\" + strTBName + ".dwg";

                dbTBAtt.ReadDwgFile(strFileName, FileOpenMode.OpenForReadAndAllShare, false, null);
                dbTBAtt.CloseInput(true);

                if (DefineBlockFromDisk2(db, strTBName, strPath))
                {
                    BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead, false);

                    if (bt == null)
                        return null;

                    ObjectId oid = AcadHelper.GetBlockTableRecordByName(strTBName, db);

                    // Create and insert the new block reference
                    brTBAtt = new BlockReference(p3dIns, oid);

                    BlockTableRecord btrTBAtt = tr.GetObject(brTBAtt.BlockTableRecord, OpenMode.ForWrite) as BlockTableRecord;

                    string strHandle = GetLayoutBlockTableRecordByName(db, strLayout);
                    ObjectId btrObjectId = GetObjectIDFromHandle(db, strHandle);
                    BlockTableRecord btrLayout = (BlockTableRecord)tr.GetObject(btrObjectId, OpenMode.ForWrite);

                    //Adding block reference to database
                    if (brTBAtt.IsNewObject)
                    {
                        using (brTBAtt)
                        {
                            btrLayout.AppendEntity(brTBAtt);
                            tr.AddNewlyCreatedDBObject(brTBAtt, true);
                        }
                    }
                    tr.Commit();
                }
            }
            return brTBAtt;
        }

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Open state of block reference