AutoCAD Blocks and Attributes

Use this skill when creating block definitions, inserting block references, working with attributes, or reading dynamic block properties.

Block Definition (BlockTableRecord)

using (Transaction tr = db.TransactionManager.StartTransaction())
{
    BlockTable bt = (BlockTable)tr.GetObject(
        db.BlockTableId, OpenMode.ForWrite);

    // Create a new block definition
    BlockTableRecord blockDef = new BlockTableRecord();
    blockDef.Name = "MyBlock";
    blockDef.Origin = new Point3d(0, 0, 0);
    blockDef.Comments = "A custom block";
    blockDef.Units = UnitsValue.Millimeters;
    blockDef.Explodable = true;