public ViewResult CascadingDropDown()
{
var viewModel = new CascadingDropDownViewModel();
viewModel.ContinentList = GetContinents();
return View(viewModel);
}
public ViewResult CascadingDropDown(CascadingDropDownViewModel viewModel)
{
if (viewModel.ContinentId != (int)Continent.Antarctica && viewModel.CountryId == null)
{
ModelState.AddModelError("CountryId", "Please select a country.");
}
if (ModelState.IsValid)
{
ViewBag.Message = "Selected";
}
viewModel.ContinentList = GetContinents();
viewModel.CountryList = GetCountries(viewModel.ContinentId);
return View(viewModel);
}