模型：

public class Settingsviewmodel
{
    public string TimeZone { get; set; }
 
    public IEnumerable<SelectListItem> TimeZones 
    {
        get 
        {
            return TimeZoneInfo
                .GetSystemTimeZones()
                .Select(t => new SelectListItem 
                { 
                    Text = t.DisplayName,Value = t.Id 
                });
        }
    }
}

控制器：

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View(new Settingsviewmodel());
    }
 
    [HttpPost]
    public ActionResult Index(Settingsviewmodel model)
    {
        return View(model);
    }
}

视图：

<% using (Html.BeginForm()) { %>
    <%= Html.DropDownListFor(
        x => x.TimeZone,new { @class = "SecureDropDown" }
    ) %>
    <input type="submit" value="Select timezone" />
<% } %>
 
<div><%= Html.Encode(Model.TimeZone) %></div>