public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
{
_uiapp = commandData.Application;
_uidoc = _uiapp.ActiveUIDocument;
_doc = _uidoc.Document;
Autodesk.Revit.DB.View actView = _doc.ActiveView;
List <Element> elemList = new List <Element>();
Autodesk.Revit.DB.View template = null;
if (actView.ViewTemplateId != ElementId.InvalidElementId)
{
template = _doc.GetElement(actView.ViewTemplateId) as Autodesk.Revit.DB.View;
}
bool VGCtrlByTmp = false;
if (template != null) // The view is controlled by a view template
{
List <ElementId> nonControledParamsIds = template.GetNonControlledTemplateParameterIds().ToList();
// graphics visibility param is included in the view template
VGCtrlByTmp = !nonControledParamsIds.Any(
id => id.IntegerValue == (int)BuiltInParameter.VIS_GRAPHICS_MODEL
);
}
IList <Reference> select = new List <Reference>();
try
{
select = _uidoc.Selection.PickObjects(Autodesk.Revit.UI.Selection.ObjectType.Element);
}
catch (Autodesk.Revit.Exceptions.OperationCanceledException)
{
return(Result.Cancelled);
}
using (Transaction t = new Transaction(_doc, "Hide categories"))
{
t.Start();
foreach (Reference elemRef in select)
{
Element elem = _doc.GetElement(elemRef);
if (VGCtrlByTmp)
{
if (template.CanCategoryBeHidden(elem.Category.Id))
{
template.SetCategoryHidden(elem.Category.Id, true);
}
else
{
MessageBox.Show(
$"The category \"{elem.Category.Name}\" of \"{elem.Name}\" can not be hidden!",
"Categories can't be hidden"
);
}
}
else
{
actView.SetCategoryHidden(_doc.GetElement(elemRef).Category.Id, true);
}
}
t.Commit();
}
return(Result.Succeeded);
}