How to Implement The DataAnnotions in mvc for DropDown List

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.

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