是否有可能從一個類重定向到一個操作方法

Question

在我MVC5應用我想從一個類重定向到一個操作方法如下

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

你可以做到這一點，但它不建議：

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(); 
} 

我認爲這將是更好地做到這樣：

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

那麼你的操作方法中：

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

    // 

}