public ActionResult DropDown()
        {
            PartsViewModel partsViewModel = new PartsViewModel();

            //Get list of options
            utility utility     = new utility();
            var     sortOptions = utility.GetOptions();

            //DropDownList property of view model will contain a list of all options.
            partsViewModel.DropDownList = utility.SetOptions(sortOptions);

            return(View(partsViewModel));
        }
        public ActionResult DropDown(PartsViewModel partsViewModel)
        {
            if (ModelState.IsValid)
            {
                {
                    //'PartsViewModel.DropDownValue' property will contain your selected value
                    //Do your stuff with this value such as DB update, etc
                }

                //Get list of options
                utility utility     = new utility();
                var     sortOptions = utility.GetOptions();

                //DropDownList property of view model will contain a list of all options.
                partsViewModel.DropDownList = utility.SetOptions(sortOptions);
            }
            return(View(partsViewModel));
        }