ZippyV said:

The code in the View:

<%: Html.ListBoxFor(Function(m) m.NewsItem.NewsCategories, Model.Categories)%>

I have had my share of headache's with the HTML.ListBoxFor


One of the gotacha's is; don't put any ViewData[] or other stuff on your form that interferes with the name, ID's ect.


Here's how I use em, that I found works:


The SalesOpsManagers is just an IList<string>



= Html.ListBoxFor(model => model.SalesOpsManagers, (IEnumerable<SelectListItem>)ViewData["TerritorySalesOpsManagers"], new { style = "width:250px;" })%>


And the viewdata is in the form of a selectlistitem, doesnt need to be multiselectlist item


hope this helps you