Setting different arrow heads for dimension style

By Virupaksha Aithal

To set the different arrow heads for dimension style, you need to make the “DimStyleTableRecord .Dimsah = true” and then set the block table record ids of the arrow head to “DimStyleTableRecord.Dimblk1” and “DimStyleTableRecord.Dimblk2”. Below code sets the arrow type “dot” and “closed” to current dimension style

[CommandMethod("DimStyle_Arrow")]

public void DimStyle_Arrow()

{

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

    Editor ed = doc.Editor;

 

 

    ObjectId id1 = GetArrowObjectId("DIMBLK1", "_DOT");

    ObjectId id2 = GetArrowObjectId("DIMBLK2", "_CLOSED");

 

    using (Transaction Tx = db.TransactionManager.StartTransaction())

    {

        DimStyleTableRecord dimStyleTable = Tx.GetObject(db.Dimstyle,

                                  OpenMode.ForWrite) as DimStyleTableRecord;

 

        dimStyleTable.Dimsah = true;

        dimStyleTable.Dimblk1 = id1;

        dimStyleTable.Dimblk2 = id2;

 

 

        db.SetDimstyleData(dimStyleTable);

        Tx.Commit();

    }

}

static ObjectId GetArrowObjectId(string arrow, string newArrName)

{

 

    ObjectId arrObjId = ObjectId.Null;

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

 

    string oldArrName =

                    Application.GetSystemVariable(arrow) as string;

 

    Application.SetSystemVariable(arrow, newArrName);

 

    if (oldArrName.Length != 0)

        Application.SetSystemVariable(arrow, oldArrName);

 

    Transaction tr = db.TransactionManager.StartTransaction();

 

    using (tr)

    {

 

        BlockTable bt = (BlockTable)tr.GetObject(

                                db.BlockTableId, OpenMode.ForRead);

        arrObjId = bt[newArrName];

        tr.Commit();

    }

 

    return arrObjId;

}