How Identifying User-Set Measurement Units in AutoCAD Architecture for Drawing, Area, Volume, and Angle?

[ramesh_choudhari]

In AutoCAD Architecture application, users have the flexibility to choose different units for area and volume measurements, such as square feet or cubic meters, independent of the drawing's original units. Now, I need to determine the units set by the user for the drawing, area, volume, and angle measurements programmatically.

Could someone provide guidance or code snippets on how I can achieve this using the .NET API? Any help would be greatly appreciated!

[Gepaha]

Search for "DrawingSetupVariables".
Add a reference to AecBaseMgd.dll.
Autodesk.Aec.ApplicationServices.DrawingSetupVariables: settings saved in the drawing database.
Autodesk.Aec.Arch.ApplicationServices.ArchDBVariables: architectural object settings.
https://www.autodesk.com/autodesk-university/class/What-AutoCADR-ACAMEP-AutoLISPR-Guy-Supposed-Do-20... 

Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
Editor ed = doc.Editor;
Database db = HostApplicationServices.WorkingDatabase;
Transaction tr = db.TransactionManager.StartTransaction();

using (tr)
{
    ObjectId objID = AecApp.DrawingSetupVariables.GetInstance(db,false);
    AecApp.DrawingSetupVariables dsv = (AecApp.DrawingSetupVariables)tr.GetObject(objID, OpenMode.ForWrite);
    // drawing units
    String from = dsv.LinearUnit.ToString();
    String to = Autodesk.Aec.BuiltInUnit.Meter.ToString();
    ed.WriteMessage("{0} to {1}.",from, to);
    dsv.LinearUnit = Autodesk.Aec.BuiltInUnit.Meter;
    // drawing scale
    double dblScale = dwgVars.DwgScale;
    // annotation plot size
    double dblPlotSize = dsv.TextHeight;

    tr.Commit();
}

ObjectId idDwgVars = DrawingSetupVariables.GetInstance(database, false);            
DrawingSetupVariables dwgVars = trans.GetObject(idDwgVars, OpenMode.ForRead) as DrawingSetupVariables;
switch (dwgVars.LinearUnit)
{
  case Autodesk.Aec.BuiltInUnit.Inch:
     // .....         
  case Autodesk.Aec.BuiltInUnit.Foot:
     // ...
  case Autodesk.Aec.BuiltInUnit.Millimeter:
     // ...
  case Autodesk.Aec.BuiltInUnit.Centimeter:
     // ...
  case Autodesk.Aec.BuiltInUnit.Decimeter:
    // ...
  case Autodesk.Aec.BuiltInUnit.Meter:
    // ...
  default:
    // ...
}