How to set Pipe Network Part’s Data Fields (PartDataField)?

By Partha Sarkar

I am trying
to use Civil 3D .NET API to set the Pipe Object's PartDataField e.g. Pipe's
Manning Coefficient. Could you help me with a code snippet to do this?

Civil 3D .NET
API allows us to set / edit the PartDataField value. First you need to open the
Part (Pipe or Structure) for write, get a reference to the Part object's
PartData property (type PartDataRecord), modify the PartDatafield value, and
then re-set the Part's PartData.

Here is a C#
code snippet which demonstrates updating Pipe's Part Data values (Manning
Coefficient):

using (Transaction ts = Application.DocumentManager.MdiActiveDocument.Database.TransactionManager.StartTransaction())
{
  Pipe PipeEle = ts.GetObject(pipeID, OpenMode.ForWrite) as Pipe;
  PartDataRecord record = PipeEle.PartData;
  PartDataField PartDataFld = record.GetDataFieldBy(PartContextType.FlowAnalysisManning);
 
  ed.WriteMessage("nManning Coefficient Value Before Change : " + PartDataFld.Value.ToString());
 
  // Change the inner data of the copy:
  PartDataFld.Value = 0.014;
 
  // Re-set the PartData property.  
  //The data will not be updated without this 
 
  PipeEle.PartData = record;
 
  ed.WriteMessage("nManning Coefficient Value After Change : " + PartDataFld.Value.ToString());
 
  ts.Commit();
}