topic Can't place a group in Revit API Forum

Can't place a group

a.sabatier — Wed, 13 Feb 2019 18:10:19 GMT

I don't know where is my mistake but when I try to create an instance of a group nothing happens..

            // On crée la liste de tous les groupes présents dans le fichier
            List<GroupType> collectiongrouptype = new FilteredElementCollector(doc).
                OfClass(typeof(GroupType)).OfType<GroupType>().ToList();

                
                using (ConfigurateurBVForm f = new ConfigurateurBVForm())
                {
                    #region  Bouton Appliquer
                    
                    f.applyButton.Click += (sender, e) =>
                    {
                        using (Transaction tr = new Transaction(doc))
                        {
                            tr.Start("Insert group");

                            //On regarde le nom qui est à inserer
                            foreach (GroupType grouptype in collectiongrouptype)
                            {
                                TaskDialog.Show("e", grouptype.Name);
                                if (grouptype.Name == "montype")
                                {
                                    TaskDialog.Show("ee", "if condition");

                                    //On crée l'instance.
                                    try
                                    {
                                        XYZ zero = new XYZ(0, 0, 0);
                                        doc.Create.PlaceGroup(zero, grouptype);
                                        break;
                                    }
                                    catch { }

                                    tr.Commit();
                                }
                            }
                        }
                    };
                    f.ShowDialog();
                }
                #endregion
            return Result.Succeeded;

Thanks for your help

Alexandre

Re: Can't place a group

naveen.kumar.t — Thu, 14 Feb 2019 05:09:16 GMT

Hi @a.sabatier ,

Filter Group instead of Grouptype and from the filtered group try to get the GroupType.

IList<Element> groups = new FilteredElementCollector(doc).OfClass(typeof(Group)).WhereElementIsNotElementType().ToElements() as IList<Element>;
                 
                 foreach (Element group in groups)
                 {
                     Group g = group as Group;
                     GroupType GT = g.GroupType;
                     doc.Create.PlaceGroup(new XYZ(0, 0, 0), GT);
                 }

If this helped solve your problem mark it as solution

Re: Can't place a group

JimJia — Thu, 14 Feb 2019 05:17:42 GMT

hi,

Some wrong in your code: after break with foreach loop, the code after break will not be executed; I guess the tr.Commit() is not called, so the placement will not occur; you should move the tr.Commit() outside foreach.

Please try following fixed code, I verified it works:

foreach (GroupType grouptype in collectiongrouptype)
{
// your other code
}
//
// commit transaction after group placing
tr.Commit();