How to validate Dropdownlist in MVC 5 using model

In this post we will learn how to validate Dropdownlist using Model in MVC 5

First create model as follows


    public class CountryModel
        [Required(ErrorMessage="Country Required.")]
        public int SelectedCountryId { get; set; }
        public System.Web.Mvc.SelectList Countries { get; set; }


In the model we have added the following line

[Required(ErrorMessage="Country Required.")]

Required is a attribute applied on SelectedCountryId.

this Required attribute is available in the namespace

using System.ComponentModel.DataAnnotations;

Required attribute force the user to send SelectedCountryId to the server, otherwise it will display the error message mentioned in the model as follows

(ErrorMessage="Country Required.")

Now write the action method in controller as follows

Action Method
        public ActionResult Index(CountryModel model)
            if (model.Countries == null)
                model.Countries = new SelectList(new List<SelectListItem>()
                    new SelectListItem() { Text= "India", Value = "1" },
                    new SelectListItem() { Text= "Australia", Value = "2"}
            return View(model);


Add the view for the above action method and write the following code in it.

@model MVCControls.Models.CountryModel
    ViewBag.Title = "Index";
<h2>Dropdownlist Validation</h2>
@using (Html.BeginForm())
    @Html.DropDownListFor(c => c.SelectedCountryId,Model.Countries, "..Select..")
    @Html.ValidationMessage("Country is required.");
    <input type="submit" name="name" value="Submit" />

Now rebuild the application and Run




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