public ActionResult Index(SelectListViewModel m)
{
// REPOPULATE THE SELECT LIST:
// Get all the animals and continents that we want pass to the selectlist
// and assign them to the corresponding properties
var animals = Help.GetAnimals();
var continents = Help.GetContinents();
// Re-populate animal and continent SelectLists:
m.AnimalList = new SelectList(animals, "AnimalID", "Name", m.SelectedAnimalsIDs);
m.ContinentList = new SelectList(continents, "ContinentID", "Name", m.SelectedContinentID);
// get the names of selected continent and animals
m.ContinentName = continents.Where(c => c.ContinentID == m.SelectedContinentID).FirstOrDefault().Name;
m.AnimalNames = new List<string>();
foreach (var a in animals)
{
if (m.SelectedAnimalsIDs.Contains(a.AnimalID))
{
m.AnimalNames.Add(a.Name);
}
}
return View(m);
}
public ActionResult Index()
{
// Get all the animals and continents that we want pass to the selectlist
// and assign them to the corresponding properties
var animals = Help.GetAnimals();
var continents = Help.GetContinents();
// Construct the view model that we want to pass to the view
var viewModel = new SelectListViewModel
{
PageTitle = "Using ViewModel property as SelectList type",
// The view's Razor helper methods will receive a constructed
// SelectList object
AnimalList = new SelectList(animals, "AnimalID", "Name"),
ContinentList = new SelectList(continents, "ContinentID", "Name"),
OptionLabel = "--- Select a continent! --- ",
// It can be null (default value), so no animals will be preselected.
// If you assign a value, animals with the ID of those numbers will be preselected
SelectedAnimalsIDs = new int[] { 2, 5, 8 },
// It can be 0 (default value), so no continent will be preselected
// If you assign a value, continent with that ID will be preselected
SelectedContinentID = 4,
// Names of the continent and animals before submission.
// If using default value (null), check for null in the view
ContinentName = string.Empty,
AnimalNames = new List<string>()
};
return View(viewModel);
}