重定向从行为过滤器属性 [英] Redirect From Action Filter Attribute

问题描述

什么是做在 ActionFilterAttribute 重定向的最佳途径。我有一个 ActionFilterAttribute 名为 IsAuthenticatedAttributeFilter 和检查会话变量的值。如果变量是假的，我希望应用程序重定向到登录页面。我想preFER使用路由名称 SystemLogin 然而，在这一点上的任何重定向的方法就可以了重定向。

What is the best way to do a redirect in an ActionFilterAttribute. I have an ActionFilterAttribute called IsAuthenticatedAttributeFilter and that checked the value of a session variable. If the variable is false, I want the application to redirect to the login page. I would prefer to redirect using the route name SystemLogin however any redirect method at this point would be fine.

推荐答案

设置filterContext.Result

随着路由名称：

filterContext.Result = new RedirectToRouteResult("SystemLogin", routeValues);

您也可以这样做：

filterContext.Result = new ViewResult
{
    ViewName = SharedViews.SessionLost,
    ViewData = filterContext.Controller.ViewData
};

---

如果你想使用RedirectToAction：

---

If you want to use RedirectToAction:

您可以使你的控制器（preferably其基础控制器），简单地调用来自System.Web.Mvc.Controller保护RedirectToAction在公共RedirectToAction方法。添加此方法允许公共调用的您的从过滤器RedirectToAction。

You could make a public RedirectToAction method on your controller (preferably on its base controller) that simply calls the protected RedirectToAction from System.Web.Mvc.Controller. Adding this method allows for a public call to your RedirectToAction from the filter.

public new RedirectToRouteResult RedirectToAction(string action, string controller)
{
    return base.RedirectToAction(action, controller);
}

那么你的过滤器看起来是这样的：

Then your filter would look something like:

   public override void OnActionExecuting(ActionExecutingContext filterContext)
   {
       var controller = (SomeControllerBase) filterContext.Controller;
       filterContext.Result = controller.RedirectToAction("index", "home");
   }

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