无法在ASP.NET MVC中更改区域性

System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");
System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("en-US");

routes.MapRoute(
    name: "Default",
    url: "{controller}/{action}/{id}",
    defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
    constraints: new { culture = new CultureConstraint(defaultCulture: "en-US") }
);

public class SetCultureAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        string culture = // 根据业务逻辑获取区域性
        System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo(culture);
        System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo(culture);
    }
}