MVC dropdownlist required field validation not working

Question

I am new to MVC, as part of my work i need to validate drop down list with required field validation, i tried in below way but Validation not working, When i click on submit button without selecting a dropdown menu Validation is not working.

Model:

[Required(ErrorMessage = "*Required")]
[Display(Name = "Environment")]
public int? Environment { set; get; }

Controller:

List<SelectListItem> environmentlist = new List<SelectListItem>();
environmentlist.Add(new SelectListItem { Text = "SIT", Value = "1" });
environmentlist.Add(new SelectListItem { Text = "UAT", Value = "2" });
environmentlist.Add(new SelectListItem { Text = "PROD", Value = "3" });
ViewBag.EnvironmentList = environmentlist;

View:

@Html.DropDownListFor(model => model.Environment,(IEnumerable<SelectListItem>)ViewBag.EnvironmentList, String.Empty)
@Html.ValidationMessageFor(model => model.Environment)

What is not working? The code you have shown will work fine (If you select the first option, you will get a validation error) — , Feb 05 '16 at 09:52
What click event? Validation is not fired on a click event, its fired when a value in a form control is changed or a form is submitted. Show the relevant code. — , Feb 05 '16 at 09:56
Are you checking whether the model sent back is valid? If it's not, you would reload the form and the validation messages would show.. In your controller action you would have something like this.. if (ModelState.IsValid) { ... do the work.... } — Emma Middlebrook, Feb 05 '16 at 10:03
This can be help [Click](https://msdn.microsoft.com/en-us/library/ee256141%28v=vs.100%29.aspx), With an [example](http://www.asp.net/mvc/overview/older-versions-1/models-data/validation-with-the-data-annotation-validators-cs) — Smit Patel, Feb 05 '16 at 10:07

score 0 · Answer 1 · edited May 23 '17 at 11:50

0

This can be help in your code,

Public ActionResult yourMethod()
{
     if (ModelState.IsValid)
     {
        // Your code
     }
     else
     {                
        return View("Same View");
     }  
}

Learn more about ModelState.IsValid.

edited May 23 '17 at 11:50

Community

1
1

answered Feb 05 '16 at 10:16

Smit Patel

2,992
1
26
44

score 0 · Answer 2 · answered Oct 11 '17 at 11:28

0

Try the following

 @Html.DropDownListFor(model => model.Environment,(IEnumerable<SelectListItem>)ViewBag.EnvironmentList, new {required = "required"})

answered Oct 11 '17 at 11:28

Kamal Singh

16
1

MVC dropdownlist required field validation not working

2 Answers2