How to Implement The DataAnnotions in mvc for DropDown List

Question

Hi All  This Is model [Required(ErrorMessage =  Please Select The Country Name.)] public string CountryName { get; set; } This is view @Html.DropDownListFor(m => m.CountryId new SelectList(Model.CountryList Id Name) new { @class = form-control placeholder = Select Country @autofocus = autofocus }) i try apply DataAnnonations dropdown list  but not working Where Iam Doing please give suggestions

Kailash Chandra Behera · Answer

Hi Change your ViewModel like this public class RegisterViewModel { //Other Properties [Required] [Display(Name = Continent)] public string SelectedContinent { set; get; } public IEnumerable Continents{ set; get; } } and in your GET Action method Set the Get the Data from your DB and set the Continents Collection property of your ViewModel public ActionResult DoThatStep() { var vm=new RegisterViewModel(); //The below code is hardcoded for demo. you may replace with DB data. vm.Continents= new[] { new SelectListItem { Value = 1 Text = Prodcer A } new SelectListItem { Value = 2 Text = Prodcer B } new SelectListItem { Value = 3 Text = Prodcer C } }; return View(vm); } and in your View (DoThatStep.cshtml) use this @model RegisterViewModel @using(Html.BeginForm()) { @Html.ValidationSummary() @Html.DropDownListFor(m => m.SelectedContinent new SelectList(Model.Continents Value Text) Select) } Now this will make your DropDown Required field.