ASP.net MVC Multiple Select item in ListBoxFor issue

Question

this is my Model :

public partial class TAUX
    {
        public short CAT_ID { get; set; }
        public int C_GARANT { get; set; }

        [Required(ErrorMessage = "Taux est obligatoire")]
        public decimal POURC_TAUX { get; set; }
        public System.DateTime DATE_EFFET { get; set; }
        public int TAUX_ID { get; set; }

        public virtual CATEGORIE CATEGORIE { get; set; }
        public virtual GARANTIE GARANTIE { get; set; }

        public IEnumerable<int> SelectItems { set; get; }
    }

This is my Controller :

public ActionResult Create()
        {
            ViewBag.CAT_ID = new SelectList(db.CATEGORIE, "CAT_ID", "LIBELLE");
            ViewBag.C_GARANT = new SelectList(db.GARANTIE, "C_GARANT", "LIB_ABREGE");
            return PartialView("_Create");
        }

This is my View :

<div class="form-group">
            <label for="Categorie">Categorie : </label>
            @Html.ListBoxFor(model => model.SelectItems, "CAT_ID")
            @Html.ValidationMessageFor(model => model.CAT_ID)
         </div>

And this the error That I got :

Error 1 :'System.Web.Mvc.HtmlHelper<pfebs0.Models.TAUX>' does not contain a definition for 'ListBoxFor' and the best extension method overload 'System.Web.Mvc.Html.SelectExtensions.ListBoxFor<TModel,TProperty>(System.Web.Mvc.HtmlHelper<TModel>, System.Linq.Expressions.Expression<System.Func<TModel,TProperty>>, System.Collections.Generic.IEnumerable<System.Web.Mvc.SelectListItem>)' has some invalid argument
Error   2: Argument 3: cannot convert from 'string' to 'System.Collections.Generic.IEnumerable<System.Web.Mvc.SelectListItem>'

What I'm trying to do is getting all data from Categorie Tabel and put it in ViewBg.CAT_ID. Then In my View I have a listBox filled with Item From ViewBag.CAT_ID, and the selected Value Will be set in SelectItems.

try my code and let me know.

Jitendra Pancholi
– Jitendra Pancholi

2014-05-14 11:26:10 +00:00
Commented May 14, 2014 at 11:26 — Jitendra Pancholi
– Jitendra Pancholi, Commented May 14, 2014 at 11:26

chiccodoro · Accepted Answer · 2014-05-14 11:51:54Z

3

Here is the issue.

@Html.ListBoxFor(model => model.SelectItems, "CAT_ID")

The second argument should be the select list rather than a string, so it should be like

@Html.ListBoxFor(model => model.SelectItems, (ViewBag.CAT_ID as SelectList))

OR

@{
 var list = ViewBag.CAT_ID as SelectList;
}

@Html.ListBoxFor(model => model.SelectItems, list )

edited May 14, 2014 at 11:51

chiccodoro

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answered May 14, 2014 at 11:13

Jitendra Pancholi

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6 Comments

Chlebta Over a year ago

This Work fine but I'm getting other error now See my update :D

Jitendra Pancholi Over a year ago

Please change the code as well which you tried so far so that we can figure out the issue.

Chlebta Over a year ago

I fixed the error See my Update on your post. thank you so much.

chiccodoro Over a year ago

@Chlebta - I updated the code of Jitendra accordingly. Editing an answer is not necessarily the right tool to communicate with the author - prefer comments instead. However fixing a little typo is fine if it is obvious. I replaced model.CAT_ID by model.SelectItems because it is obvious from your original code.

chiccodoro Over a year ago

@Chelbta - ... presuming that model.SelectItems is the property that the user will change by using the listbox. It is a bit confusing because SelectList sounds as if it was the list of available items to select from. The items that the user selected could be better named e.g. as SelectedCategoryIDs.

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