MMVC2重定向有关问题

MMVC2重定向问题
ASP.NET中

C# code

if (!IsPostBack) {if (Session["UserID"] == null) {    Response.Redirect("Login.aspx"); }else{    Response.Redirect("xxx.aspx");}}

C# code

public ActionResult Register()        {            if (Session["UserID"] != null)            {                          }   return View();        }

C# code

跳转到Urlpublic ActionResult rdurl(){return Redirect("http://www.baidu.com");}跳转到Actionpublic ActionResult rdaction(){return RedirectToAction("Index","Eice");}