Populate DropDown using array

Question

I need to populate a dropdown with some data i get from a SOAP server. The server provides me an array of the companies.

How would i use it to populate the DD ?

Here is my User class:

public class Usuario
{
    public string Nome { get; set; }
    public string Token { get; set; }
    public IEnumerable<SelectListItem> Unidades { get; set; }
}

Here is where i receive the companies and send it to the view, i get it from another Action that is redirecting to this Action:

var usuario = TempData["objUsuario"] as UsuarioSSO;

if (usuario == null) return RedirectToAction("Index", "Login");

if (usuario.UsuarioUnidades == null)
{
    ModelState.AddModelError("", "Usuário não possui unidades");

    return View();
}

var model = new Models.Usuario
{
    Unidades = usuario.UsuarioUnidades.ToList().Select(x => new SelectListItem
    {
        Value = x.CodigoEmitente.ToString(),
        Text = x.NomeFantasia
    })
};

return View(model);

Here is how i'm trying to display it:

@Html.DropDownListFor(x => x.Unidades, new SelectList(Model.Unidades))

I have already tried of everything but it won't work, i get some conversion errors and when i can make it work it won't display the content, it will only display the object inside the Text area

System.Web.Mvc.SelectListItem

I can't really undestand what "won't work" from your description, but the main problem I see if that you have not ogt a property on your model for the selected value. Once you have then the syntax is @Html.DropDownListFor(x => x.SelectedUnidadeId, new SelectList(Model.Unidades)) — Coding Flow
– Coding Flow, Commented Dec 11, 2014 at 11:49

Christoph Fink · Accepted Answer · 2014-12-11 11:51:05Z

4

You need to have one property for the selected item and the list of available items, e.g.:

public class Usuario
{
    public string Nome { get; set; }
    public string Token { get; set; }
    public string Unidade { get; set; }
    public IEnumerable<SelectListItem> Unidades { get; set; }
}

and then create the drop-down like:

@Html.DropDownListFor(x => x.Unidade, Model.Unidades)

You can directly supply the Unidades as it is already IEnumerable<SelectListItem>.

P.S.: I guessed the singular of Unidades as I do not speak your langauge, whatever it is. I recommend to ALWAYS use english in source code.

answered Dec 11, 2014 at 11:51

Christoph Fink

23.2k9 gold badges72 silver badges118 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Ariel Over a year ago

Thanks buddy, worked like a charm ! Sorry about the language thing and by the way u guessed right. Just one question, this DD is inside a form that will be posted to my Action but i'm getting a invalid modelstate

Christoph Fink Over a year ago

What error do you get exactly (update your question)?

user3559349 · Accepted Answer · 2014-12-11 11:53:11Z

4

Your model needs a value type property to bind the selected option to. If CodigoEmitenteis typeof int then you model property needs to be

public int SelectedUnidades { get; set; }

and you need to assign the SelectList to another property in your view model or to a ViewBag property

ViewBag.UnidadesList = new SelectList(usuario.UsuarioUnidades, "CodigoEmitente", "NomeFantasia");

Then in the view

@Html.DropDownListFor(x => x.SelectedUnidades, (SelectList)ViewBag.UnidadesList)

answered Dec 11, 2014 at 11:53

user3559349

Collectives™ on Stack Overflow

Populate DropDown using array

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related