asp.net mvc Html.Listbox - how to add an item manually

Question

I am looking for a way to manually add items to html.ListBox in mvc. I want the top item to be "All Items". i.e.

All Items
Item1
Item2
Item3

I am currently calling:

<%=Html.ListBox("items", Model.Items, new { style = "height:50px;width:100%" })%>

I may have to add it in the model when setting up the MultiSelectList, but would be prefer to add this in the controller.

Cheers

Can you post some of the controller's code ?

Alex LE
– Alex LE

2010-02-22 16:48:15 +00:00
Commented Feb 22, 2010 at 16:48 — Alex LE
– Alex LE, Commented Feb 22, 2010 at 16:48

Dan · Accepted Answer · 2010-02-22 17:04:55Z

2

You can simply have your view model contain a list of SelectListItem and add the item manually in the controller. For example:

List<SelectListItem> modelSelectList = model.Select(x => new SelectListItem()
                {
                    Text = x.Name,
                    Value = x.ID.ToString()
                }).ToList();

modelSelectList .Add(new SelectListItem() { Selected = false, Text = "All Items", Value = "-1");

answered Feb 22, 2010 at 17:04

Dan

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2 Comments

Samuel Goldenbaum Over a year ago

thanks for the reply Dan. Will work but need to position the item at the top of the list

Samuel Goldenbaum Over a year ago

Sorted - converted to IList<SelectListItem> and then did and Insert at 0. Thanks

Rune · Accepted Answer · 2010-02-22 17:03:46Z

1

I would prefer doing it in your controller, but for a quick fix I guess you could do something like

<% var items = Model.Items.ToList(); items.Insert(0, new SelectListItem() { Text = "All items" }); %>
<% Html.ListBox("items", items, new { style = "height:50px;width:100%" })%>

answered Feb 22, 2010 at 17:03

Rune

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2 Comments

Samuel Goldenbaum Over a year ago

Thanks for the reply Rune. How would you get the correct ordinance at the controller. Simply Adding will only append to the bottom of the bound items?

Samuel Goldenbaum Over a year ago

Sorted - converted to IList<SelectListItem> and then did and Insert at 0. Thanks

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