How to add parameters to an element in Forge API

Question

I am working on a project where I need to create an element (example a wall) and add shared parameters to it in Forge API.

I created the wall using Design automation API for Revit, but since there is no UI in Design Automation API, I was not able to create parameters
Is there a method like the below code, which we were able to write within transaction in Revit API.

if (element.LookupParameter(param).IsReadOnly == false)
{
    if (!type.Name.Equals("Double"))
    {
        if (!string.IsNullOrEmpty(value.ToString()))
            element.LookupParameter(param).Set(value.ToString());
    }
    else
    {
        if (!double.IsNaN((double)value))
            element.LookupParameter(param).Set((double)value);
    }
}

Is it possible to create instance and type parameters for a particular element in Design Automation API or do I have to use some other Forge API?
It would be great if someone could guide me with this.
Thank you

Answer 1

I happened to have produced a demo to work with shared parameters by Design Automation. The source project is available at https://github.com/xiaodongliang/Revit-room-space-with-Forge-viewer

It is based on the skeleton of our learn forge tutorial. The related codes to add share parameter are these lines: https://github.com/xiaodongliang/Revit-room-space-with-Forge-viewer/blob/master/updateRVTParam/Commands.cs#L259-L269

  //add shared parameter definition
  AddSetOfSharedParameters(rvtDoc);

  //......
  //......

  //add shared parameter to the specific shape
 using (Transaction tx = new Transaction(rvtDoc))
                    {
                        tx.Start("Change P");

                        Element readyDS = rvtDoc.GetElement(roomId);
                        Parameter p = readyDS.LookupParameter("RoomNumber");
                        if (p != null)
                        {
                            p.Set(room.Number.ToString());
                        }
                        tx.Commit();
                    }

Hope it helps.