Change line weight

By Virupaksha Aithal

To make the entity line weight visible in model space, you have to make the Database property “LineWeightDisplay” true. Below code shows a simple sample which modifies the curves line type and enables the diaply of line weight by setting “LineWeightDisplay = true”.

[CommandMethod("changeLineWeight")]

public void changeLineWeight()

{

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

    Editor ed = doc.Editor;

 

    PromptEntityOptions options =

              new PromptEntityOptions("\nSelect curve : ");

    options.SetRejectMessage("\nSelect only curves");

    options.AddAllowedClass(typeof(Curve), false);

 

    PromptEntityResult acSSPrompt = ed.GetEntity(options);

 

    if (acSSPrompt.Status != PromptStatus.OK)

        return;

 

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

    {

        Curve ent = tx.GetObject(acSSPrompt.ObjectId,

                               OpenMode.ForWrite) as Curve;

 

        ent.LineWeight = LineWeight.LineWeight035;

 

        tx.Commit();

    }

 

    //make sure you set the LineWeightDisplay flag as true

    db.LineWeightDisplay = true;

}