private void EventHandlerCore_ObjectSelected(object sender, BimPlusEventArgs e) { Debug.WriteLine(string.Format("Id:{0} Selected:{1} Multiselect:{2}", e.Id, e.Selected, e.Multiselect)); if (e.Id != Guid.Empty || e.Selected != true) { DtObject dtObject = _integrationBase.ApiCore.DtObjects.GetObject(e.Id, ObjectRequestProperties.AttributDefinition | ObjectRequestProperties.Pset); if (dtObject != null) { if (e.Multiselect == true) { if (SelectedObjects.FirstOrDefault(o => o.Id == e.Id) == null) { SelectedObjects.Add(dtObject); } } else { SelectedObjects.Clear(); if (e.Selected == true) { SelectedObjects.Add(dtObject); } } } if (e.Selected == false) { DtObject exist = SelectedObjects.FirstOrDefault(o => o.Id == e.Id); if (exist != null) { SelectedObjects.Remove(exist); } else { SelectedObjects.Clear(); } } else if (e.Selected == null && e.Id != Guid.Empty) { if (dtObject != null) { if (SelectedObjects.FirstOrDefault(o => o.Id == e.Id) == null) { SelectedObjects.Add(dtObject); } } else { SelectedObjects.Clear(); } } List <DtObject> newList = new List <DtObject>(); newList.AddRange(SelectedObjects); SelectedObjects = newList; Trace.WriteLine(string.Format("_selectedObjects.Count:{0}", SelectedObjects.Count())); } }