是否可以从类重定向到Action方法

Question

在我的MVC5应用程序中，我想从类中重定向到一个动作方法，如下所示

  public static User GetUserObject()
    {
        if (HttpContext.Current.Session["CurrentUser"] != null)
        {
            User currentUser = HttpContext.Current.Session["CurrentUser"] as User;

            return currentUser;
        }
        else
        {
            //I want to redirect to the login action method from here
        }
    }

Answer 1

你可以这样做，但不推荐：

else {
    var context = new RequestContext(
    new HttpContextWrapper(System.Web.HttpContext.Current),
    new RouteData());
    var urlHelper = new UrlHelper(context);
    var url = urlHelper.Action("About", "Home");
    System.Web.HttpContext.Current.Response.Redirect(url);
    return new User();
}

我认为这样做会更好：

public static User GetUserObject()
{
     return HttpContext.Current.Session["CurrentUser"] as User;
} 

然后在你的行动方法中：

public ActionResult Index()
{
    var userObject = Helpers.Helper.GetUserObject();
    if (userObject == null)
         return RedirectToAction("actionName", "controllerName");
    else
         return RedirectToAction("", "")

    //

}