Modifications are only saved if tr.Commit() executes. If an exception occurs, the transaction automatically aborts when exiting the using (Transaction tr = ...) block, rolling back any partial database corruptions.
[CommandMethod("CreateMyBlock")] public void CreateBlockDefinition() Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; using (Transaction tr = db.TransactionManager.StartTransaction()) // Open the Block Table for read BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead); string blockName = "CustomCircleBlock"; // Check if the block definition already exists if (!bt.Has(blockName)) // Upgrade the Block Table to write status bt.UpgradeOpen(); // Create the new block definition using (BlockTableRecord btr = new BlockTableRecord()) btr.Name = blockName; btr.Origin = new Point3d(0, 0, 0); // Set the base insertion point // Add geometry to the block definition using (Circle circle = new Circle(new Point3d(0, 0, 0), Vector3d.ZAxis, 5.0)) btr.AppendEntity(circle); tr.AddNewlyCreatedDBObject(circle, true); // Add the new definition to the Block Table bt.Add(btr); tr.AddNewlyCreatedDBObject(btr, true); doc.Editor.WriteMessage($"\nBlock 'blockName' created successfully."); else doc.Editor.WriteMessage($"\nBlock 'blockName' already exists."); tr.Commit(); Use code with caution. 4. Inserting a Block Reference autocad block net
Standard names fail when dynamic instances transform into *U strings. Modifications are only saved if tr
In the world of computer-aided design (CAD), efficiency is the ultimate metric of success. For architects, engineers, and designers, repetitive tasks are the enemy of productivity. Among the most powerful tools available to combat this inefficiency is the AutoCAD block. However, as projects grow in complexity and teams expand across locations, managing these blocks becomes a challenge. managing these blocks becomes a challenge.
Do you need to handle or nested blocks ?