Here’s an example illustrating the strongly typed version:
Model:
public class MyViewModel
{
public int[] SelectedItemIds { get; set; }
public MultiSelectList Items { get; set; }
}
Controller:
public class HomeController : Controller
{
public ActionResult Index()
{
// Preselect items with id 1 and 3
var selectedItemIds = new[] { 1, 3 };
var model = new MyViewModel
{
Items = new MultiSelectList(
new[]
{
// TODO: Fetch from your repository
new { Id = 1, Name = "item 1" },
new { Id = 2, Name = "item 2" },
new { Id = 3, Name = "item 3" },
},
"Id",
"Name",
selectedItemIds
)
};
return View(model);
}
}
View:
<%: Html.ListBoxFor(x => x.SelectedItemIds, Model.Items) %>