MVC3 Razor SelectedValue in DropdownListFor

Question

I've the following code for a DropDownListFor and is working ok

@Html.DropDownListFor(Function(model) model.Habilitacoes, New SelectList(ViewBag.Habilitacoes, "KeyHL", "DescricaoHL"), New With {.class = "FillHSpace"})

The ViewBag.Habilitacoes is a List(Of T)

But know I want to add the SelectedValue to the DropDownListFor, so I've used the following code but doesn't work.

@Html.DropDownListFor(Function(model) model.Habilitacoes, New SelectList(ViewBag.Habilitacoes, "KeyHL", "DescricaoHL", model.Habilitacoes), New With {.class = "FillHSpace"})

How can I declare the SelectedValue?

I'd use a property (e.g. SelectedHabilitaco - whatever that is ;) ) on the model. And use it as the first parameter of DropDownListFor - like in this answer: stackoverflow.com/questions/3386998/… (see Update 2). — Yakimych
– Yakimych, Commented May 30, 2012 at 14:29

Darin Dimitrov · Accepted Answer · 2012-05-30 14:32:43Z

2

You should not use the same property as first and second argument of the DropDownListFor helper. The first argument is a scalar property and the second a collection:

@Html.DropDownListFor(Function(model) model.SelectedHabilitacoes, New SelectList(ViewBag.Habilitacoes, "KeyHL", "DescricaoHL"), New With {.class = "FillHSpace"})

and then in your controller:

model.SelectedHabilitacoes = "123"

answered May 30, 2012 at 14:32

Darin Dimitrov

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Blast_dan · Accepted Answer · 2012-05-30 14:34:03Z

0

DropdownListFor has overloads to accomplish this

DropDownListFor([SelectedValue], [SelectList], optional HTML Attributes)

Normally you would go

DropDownListFor(model => model.ID, (SelectList)ViewsBag.MySelectList, optional HTML Attributes)

The selected value will be automatically bound to the dropdown list, and will automatically be posted the the model.ID value

if this doesn't help id ask you to post your model.

answered May 30, 2012 at 14:34

Blast_dan

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