asp.net-mvc – RedirectToAction不工作

public ViewResult Index()
    {
        return View("Index",new TrainingViewModel());
    }

public ActionResult Edit()
{
    //save the details and return to list
    return RedirectToAction("Index");

}

我究竟做错了什么 ？

public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            routes.IgnoreRoute("{resource}.js/{*pathInfo}");

            routes.IgnoreRoute("{*favicon}",new { favicon = @"(.*/)?favicon.ico(/.*)?" });

            routes.MapRoute(
                "Default",// Route name
                "{controller}/{action}/{id}",// URL with parameters
                new { controller = "Home",action = "Index",id = "" } // Parameter defaults
                );
        }

// JQUERY CALLS

this.SynchValuesToReadOnly = function() {
        window.location = $('#siteRoot').attr('href') + 'Sites/';

    };

    this.OnSiteEdit = function() {

        //post back to the server and update the assessment details    
        var options = {
            target: '',type: 'post',url: '/Site/Edit',beforeSubmit: othis.validate,success: othis.SynchValuesToReadOnly
        };

        $('#uxSiteForm').ajaxSubmit(options);
                };