How to Populate ListBoxFor in Mvc3?

Question

I have a list of type stored procedure which have an ID and a Name as data in it. i have property of int type in model and a list of same stored procedure. now i want to bind this information into ListBoxFor

in view i have written this

@Html.ListBoxFor(x => x.HobbyId, new MultiSelectList(Model.listHobby, "pkHobbyId", "Hobby"))

but i am getting an error

The parameter 'expression' must evaluate to an IEnumerable when multiple selection is allowed.

Please Help how to bind.

Please post also the Model. What type is listHobby?. How you set values to it?. — Iridio
– Iridio, Commented Apr 5, 2012 at 12:58

Azadrum · Accepted Answer · 2012-04-05 13:14:25Z

7

try that

@Html.ListBoxFor(x => x.HobbyId, Model.listHobby.Select(f => new SelectListItem { Text = f.Hobby, Value = f.pkHobbyId.ToString() }), new { Multiple = "multiple" })

listHobby is iEnumerable list on my sample

sorry if i mislead you, rushed to answer but you cannot get the result of the multiselect listbox into a guid or int variable (whatever type is your HoobyId is) you should have an array to grab the result like

public string[] SelectedHobbyIds { get; set; }

so there must be something wrong with your View Models so its better that u would post your view models to be checked

edited Apr 5, 2012 at 13:14

answered Apr 5, 2012 at 13:00

Azadrum

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Rachit Over a year ago

yes i get it i m returning the value in hobby id which is of int whereas i have to return in a collection.

Rifaj · Accepted Answer · 2013-01-14 10:09:13Z

5

@ Chhatrapati Sharma,

In your controller, try this,

ViewData['anyName'] = new SelectList {
 Text = ,  // text from ur function
 Value = , // Value from function
 Selected = // if required
}

and in view, bind the viewdata like,

 <@Html.ListBox("docImages", ((IEnumerable<SelectListItem>)ViewData["anyName"]))

For testing, try a sample selectlist item as follows,

ViewData['anyName'] = new List<SelectListItem>{ 
                new SelectListItem {Text = "First", Value = "0"}, 
                new SelectListItem {Text = "Second"), Value = "1"}, 
                new SelectListItem {Text = "Third", Value = "2"} 
                    };

If this sample works, then check your function "_supp.listDocImages()" and make sure it return IList

edited Jan 14, 2013 at 10:09

answered Jan 14, 2013 at 10:02

Rifaj

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Comments

Yorgo · Accepted Answer · 2012-04-05 13:51:26Z

3

@Html.ListBoxFor(x => x.HobbyId, Model.listHobby.Select(f => new SelectListItem { Text = f.Hobby, Value = f.pkHobbyId.ToString() }), new { Multiple = "multiple" })

HobbyId in expression must be ienumerable because you set multi select

answered Apr 5, 2012 at 13:51

Yorgo

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1 Comment

Chhatrapati Sharma Over a year ago

it didn't work for me // controller public ActionResult AddEditSupplier(int id) { clsSupplier _supp = new clsSupplier(); _supp.lstDocImgs = _supp.listDocImages();// it's working fine _supp.lstDocFiles = _supp.listDocFiles(); // it's working fine return View(_supp); } //View but in view both are not working @Html.ListBoxFor(x => x.DocumentId, new selectList(Model.lstDocImgs, "documentid", "title")) @Html.ListBoxFor(x => x.DocumentId, Model.lstDocImgs.Select(f => new SelectListItem { Text = f.Title, Value = f.documentid.ToString() }), new { Multiple = "multiple" })

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