datagridview

[yoitsarun]

hi, loading data working fine. but updating attribute is not working. can anyone help me.

 private void button2_Click(object sender, EventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.Filter = "AutoCAD Drawing (*.dwg)|*.dwg";
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                // Open the selected drawing
                DocumentCollection acDocMgr = Application.DocumentManager;
                acDoc = acDocMgr.Open(dlg.FileName, false);
                acDb = acDoc.Database;

                // Load the attribute values into the DataGridView
                LoadAttributeValues();
            }
        }

        private void LoadAttributeValues()
        {
            layouts = new List<Layout>();
            //List<Layout> layouts = new List<Layout>();
            using (acTrans = acDb.TransactionManager.StartTransaction())
            {
                // Get the layout dictionary
                DBDictionary layoutDict = acTrans.GetObject(acDb.LayoutDictionaryId, OpenMode.ForRead) as DBDictionary;

                // Iterate through each layout and add it to the list
                foreach (DBDictionaryEntry entry in layoutDict)
                {
                    Layout layout = acTrans.GetObject(entry.Value, OpenMode.ForWrite) as Layout;
                    layouts.Add(layout);
                }

                acTrans.Commit();
            }

            // Load the attribute values into the DataGridView
            DataTable dataTable = new DataTable();
            dataTable.Columns.Add("Layout");
            dataTable.Columns.Add("Tag");
            dataTable.Columns.Add("Value");
            foreach (Layout layout in layouts)
            {
                using (acTrans = acDb.TransactionManager.StartTransaction())
                {
                    BlockTableRecord acBlkTblRec = acTrans.GetObject(layout.BlockTableRecordId, OpenMode.ForRead) as BlockTableRecord;
                    foreach (ObjectId acObjId in acBlkTblRec)
                    {
                        Entity entity = acTrans.GetObject(acObjId, OpenMode.ForRead) as Entity;
                        if (entity is BlockReference)
                        {
                            BlockReference blockRef = entity as BlockReference;
                            foreach (ObjectId attId in blockRef.AttributeCollection)
                            {
                                AttributeReference attRef = acTrans.GetObject(attId, OpenMode.ForRead) as AttributeReference;
                                if (attRef != null)
                                {
                                    DataRow row = dataTable.NewRow();
                                    row["Layout"] = layout.LayoutName;
                                    row["Tag"] = attRef.Tag;
                                    row["Value"] = attRef.TextString;
                                    dataTable.Rows.Add(row);
                                }
                            }
                        }
                    }
                    acTrans.Commit();
                }
            }
            dataGridView1.DataSource = dataTable;
        }

        private void button1_Click(object sender, EventArgs e)
        {

            var doc = Application.DocumentManager.MdiActiveDocument;
            var ed = doc.Editor;
            var db = doc.Database;
            using (var tr = db.TransactionManager.StartTransaction())
            {
                foreach (var li in _layouts)
                {
                    if (li.AttributeValue != dataGridView1.CurrentRow.Cells[2].Value.ToString())
                    {
                        var blockTable = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                        var layoutName = li.LayoutName;
                        if (layoutName == "*ModelSpace*")
                        {
                            var blockTableRecord = tr.GetObject(blockTable[BlockTableRecord.ModelSpace], OpenMode.ForRead) as BlockTableRecord;
                            foreach (ObjectId objId in blockTableRecord)
                            {
                                var ent = tr.GetObject(objId, OpenMode.ForWrite) as Entity;
                                var attDef = ent as AttributeDefinition;
                                if (attDef != null && attDef.Tag == li.BlockName)
                                {
                                    attDef.UpgradeOpen();
                                    attDef.TextString = dataGridView1.CurrentRow.Cells[2].Value.ToString();
                                    attDef.DowngradeOpen();
                                }
                            }
                        }
                        else
                        {
                            var layout = tr.GetObject(blockTable[layoutName], OpenMode.ForWrite) as Layout;
                            var blkTblRecId = layout.BlockTableRecordId;
                            var blkTblRec = tr.GetObject(blkTblRecId, OpenMode.ForWrite) as BlockTableRecord;
                            foreach (ObjectId objId in blkTblRec)
                            {
                                var blkRef = tr.GetObject(objId, OpenMode.ForWrite) as BlockReference;
                                if (blkRef != null && blkRef.Name == li.BlockName)
                                {
                                    foreach (ObjectId attId in blkRef.AttributeCollection)
                                    {
                                        var attRef = tr.GetObject(attId, OpenMode.ForWrite) as AttributeReference;
                                        if (attRef != null && attRef.Tag == li.BlockName)
                                        {
                                            attRef.UpgradeOpen();
                                            attRef.TextString = dataGridView1.CurrentRow.Cells[2].Value.ToString();
                                            attRef.DowngradeOpen();
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
                tr.Commit();
            }            
            ed.Regen();
        }