Every drawing database contains a set of symbol tables. The most critical table for geometric content is the .
Ensure these references have Copy Local set to False to prevent assembly conflicts at runtime. 3. Creating a Block Definition Programmatically autocad block net
[CommandMethod("InsertMyBlock")] public void InsertBlockInstance() Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; using (Transaction trans = db.TransactionManager.StartTransaction()) BlockTable blkTable = trans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable; string blockName = "Custom_Rectangle"; if (blkTable.Has(blockName)) // Get the Model Space record BlockTableRecord modelSpace = trans.GetObject(blkTable[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; // Get the Object ID of our block definition ObjectId blockDefId = blkTable[blockName]; // Define insertion properties Point3d insertPoint = new Point3d(20, 20, 0); Scale3d scale = new Scale3d(1.0, 1.0, 1.0); double rotation = 0.0; // In Radians // Create the Block Reference using (BlockReference blkRef = new BlockReference(insertPoint, blockDefId)) blkRef.ScaleFactors = scale; blkRef.Rotation = rotation; // Append the instance to Model Space modelSpace.AppendEntity(blkRef); trans.AddNewlyCreatedDBObject(blkRef, true); doc.Editor.WriteMessage($"\nInstance of 'blockName' inserted."); else doc.Editor.WriteMessage($"\nBlock definition not found. Run 'CreateMyBlock' first."); trans.Commit(); Use code with caution. Working with Block Attributes Every drawing database contains a set of symbol tables
Dynamic blocks contain parameters and actions that allow users to change their shape, size, or configuration without redefining the block. Through the .NET API, you can inspect and change these dynamic properties programmatically. Database db = doc.Database
var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead); if (bt.Has("MyBlock"))