Creating AutoCAD Civil 3D Pipe Label using .NET API

By Partha Sarkar

In AutoCAD Civil 3D we can conveniently add labels to Pipe / PipeNetwork using UI tools / commands as shown in the screenshot below :

If you want to add Labels to Civil 3D Pipe objects without any user interaction, you can use PipeLabel.Create() .NET API.

Here is a C# .NET code snippet demonstrating the how to add a Pipe Label : 

ObjectId pipeID = ed.GetEntity(opt).ObjectId;
 
CivilDocument civildoc = CivilApplication.ActiveDocument;
using (Transaction ts = AcadApp.DocumentManager.MdiActiveDocument.Database.TransactionManager.StartTransaction())
{
 
  // We will use PipeLabel.Create()
  // public static ObjectId Create(  ObjectId pipeId,  double ratio,  ObjectId labelStyleId )
  // pipeId - Type: ObjectId // The ObjectId of Pipe on which the label is located.
  // ratio - Type: System.Double // The relative position of the label to the pipe.
  // labelStyleId - Type: ObjectId // The ObjectId of a PipeLabel style to use.
 
  ObjectId labelStyleId = civildoc.Styles.LabelStyles.PipeLabelStyles.PlanProfileLabelStyles[0];
  PipeLabel.Create(pipeID, 0.5, labelStyleId);          
  ts.Commit();
}

And the result in Civil 3D :