How to redirect from OnActionExecuting in Base Controller?

问题

I have tried two ways: Response.Redirect() which does nothing, as well as calling a new method inside of the Base Controller that returns an ActionResult and have it return RedirectToAction()... neither of these work.

How can I do a redirect from the OnActionExecuting method?

回答1:

 public override void OnActionExecuting(ActionExecutingContext filterContext)
 {
    ...
    if (needToRedirect)
    {
       ...
       filterContext.Result = new RedirectResult(url);
       return;
    }
    ...
 }

回答2:

It can be done this way as well:

filterContext.Result = new RedirectToRouteResult(
    new RouteValueDictionary
    {
        {"controller", "Home"},
        {"action", "Index"}
    }
);

回答3:

Create a separate class,

    public class RedirectingAction : ActionFilterAttribute
    {
      public override void OnActionExecuting(ActionExecutingContext context)
      {
        base.OnActionExecuting(context);

        if (CheckUrCondition)
        {
            context.Result = new RedirectToRouteResult(new RouteValueDictionary(new
            {
                controller = "Home",
                action = "Index"
            }));
        }
      }
   }

Then, When you create a controller, call this annotation as

[RedirectingAction]
public class TestController : Controller
{
    public ActionResult Index()
    {
        return View();
    }
}

回答4:

If the redirected controller inherit from the same baseController where we override the OnActionExecuting method cause recursive loop. Suppose we redirect it to login action of account controller, then the login action will call OnActionExecuting method and redirected to the same login action again and again ... So we should apply a check in OnActionExecuting method to check weather the request is from the same controller if so then do not redirect it login action again. here is the code:

protected override.

void OnActionExecuting(ActionExecutingContext filterContext)
{
   try
   {
      some condition ...
   }
   catch
   {
      if (filterContext.Controller.GetType() !=     typeof(AccountController))
      {
         filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary { { "controller", "Account" }, { "action", "Login" } });
      }
   }
}

来源：https://stackoverflow.com/questions/3214774/how-to-redirect-from-onactionexecuting-in-base-controller

标签

asp.net-mvc

onactionexecuting