MVC Checkboxes

MVCCheckboxes.cs

/*
Here’s a neat nuget for packing lists of checkboxes based on a MVC model.  Currently implementing this for activities on the signup form.

http://www.codeproject.com/Tips/613785/How-to-Use-CheckBoxListFor-With-ASP-NET-MVC

note, as shown below, you do actually need to get the list of available ones twice.

There is also relatively new to .net html.enumdropdownlist for.  I think I will implement this for the gender selection.
https://msdn.microsoft.com/en-us/library/system.web.mvc.html.selectextensions.enumdropdownlistfor(v=vs.118).aspx
*/

/// <summary>
        /// for get all fruits
        /// </summary>
        [HttpGet]
        public ActionResult Index()
        {
            return View(GetFruitsInitialModel());
        }

        /// <summary>
        /// for post user selected fruits
        /// </summary>
        [HttpPost]
        public ActionResult Index(PostedFruits postedFruits)
        {
            return View(GetFruitsModel(postedFruits));
        }

private FruitViewModel GetFruitsModel(PostedFruits postedFruits)
        {
            // setup properties
            var model = new FruitViewModel();
            var selectedFruits = new List<Fruit>();
            var postedFruitIds = new string[0];
            if (postedFruits == null) postedFruits = new PostedFruits();

            // if a view model array of posted fruits ids exists
            // and is not empty,save selected ids
            if (postedFruits.FruitIds != null && postedFruits.FruitIds.Any())
            {
                postedFruitIds = postedFruits.FruitIds;
            }

            // if there are any selected ids saved, create a list of fruits
            if (postedFruitIds.Any())
            {
              selectedFruits = FruitRepository.GetAll()
               .Where(x => postedFruitIds.Any(s => x.Id.ToString().Equals(s)))
               .ToList();
            }

            //setup a view model
            model.AvailableFruits = FruitRepository.GetAll().ToList();
            model.SelectedFruits = selectedFruits;
            model.PostedFruits = postedFruits;
            return model;
        }