Hi.
I'm trying to create an addin which will update the IFC-parameter "IfcName" for all rebars in a project. However, I'm encountering a problem whenever I have a rebar set with the "Fixed number" layout. The barSpacing parameter is generating an error, because a rebar set with fixed numbers does not have any information about spacing, so it throws an error. I can not seem to find a good way to check if the layout rule is fixed numbers (or single). The Rebar class has a property named LayoutRule, which seems to be what I'm after, but it does not show up in my IDE (Visual Studio). Seems to me the property doesn't exist at all. Any suggestions how to solve this?
Tom
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB.Structure;
using Autodesk.Revit.UI.Selection;
using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using Autodesk.Revit.Attributes;
using System.Windows.Forms;
namespace RevitClassLibrary.Armering
{
[Transaction(TransactionMode.Manual)]
public class UpdateIfcName : IExternalCommand
{
public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
{
UIApplication uiapp = commandData.Application;
UIDocument uidoc = uiapp.ActiveUIDocument;
Document doc = uidoc.Document;
// Get all rebars in the document
FilteredElementCollector collector = new FilteredElementCollector(doc);
ICollection<Element> rebars = collector.OfClass(typeof(Rebar)).ToElements();
// Iterate through each rebar and update IfcName parameter
foreach (Element rebar in rebars)
{
// Get the required parameters
var barQuantity = rebar.get_Parameter(BuiltInParameter.REBAR_ELEM_QUANTITY_OF_BARS).AsInteger();
var barSpacing = (barQuantity > 1) ? rebar.get_Parameter(BuiltInParameter.REBAR_ELEM_BAR_SPACING).AsValueString().TrimEnd('m').Trim() : null;
var barDiameter = rebar.get_Parameter(BuiltInParameter.REBAR_BAR_DIAMETER).AsValueString().TrimEnd('m').Trim();
var posisjonsnummer = rebar.LookupParameter("Postnummer").AsString();
var cqRebarSuffix = rebar.LookupParameter("CQRebarSuffix").AsString();
var ifcName = barQuantity + "ø" + barDiameter + "c" + barSpacing + ", " + posisjonsnummer + ", " + cqRebarSuffix;
// Write to the IfcName parameter
Parameter ifcNameParameter = rebar.LookupParameter("IfcName");
if (ifcNameParameter != null && !ifcNameParameter.IsReadOnly)
{
using (Transaction transaction = new Transaction(doc, "Update IfcName"))
{
transaction.Start();
ifcNameParameter.Set(ifcName);
transaction.Commit();
}
}
}
return Result.Succeeded;
}
}
}
