BlueSky.CommandExecutionHelper.PreExecuteSub C# (CSharp) Method

        private void PreExecuteSub()//16May2013
        {
            UIController = LifetimeService.Instance.Container.Resolve<IUIController>();

            ds = UIController.GetActiveDocument();

            ////24Apr2014  If no dataset is open, we still need to run some commands from Syntax, those do not require Dataset
            //so following 'if' is commented out
            //if (ds == null)
            //{
            //    canExecute = false;
            //    return;
            //}

            if (ds != null) //24Apr2014 
                Variables = new ObservableCollection<DataSourceVariable>(ds.Variables);
        }