如何获得filterredirect到另一个行动？

RedirectToAction是受保护的，我们只能在动作中使用它。 但是，如果我想在一个filterredirect？

 public class IsGuestAttribute: ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { if (!Ctx.User.IsGuest) filterContext.Result = (filterContext.Controller as Controller) .RedirectToAction("Index", "Home"); } } 

Answer 1

RedirectToAction只是构造一个RedirectToRouteResult()的帮助器方法，所以你要做的就是创build一个新的RedirectToRouteResult()传递一个RouteValueDictionary()值给你的动作。

根据以下注释中的@Domenic代码完成示例：

 public class IsGuestAttribute: ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { if (!Ctx.User.IsGuest) { filterContext.Result = new RedirectToRouteResult( new RouteValueDictionary { { "controller", "Home" }, { "action", "Index" } }); } } } 

Answer 2

这是一个代码示例：

 public override void OnActionExecuting(ActionExecutingContext filterContext) { if (!Ctx.User.IsGuest) { RouteValueDictionary redirectTargetDictionary = new RouteValueDictionary(); redirectTargetDictionary.Add("action", "Index"); redirectTargetDictionary.Add("controller", "Home"); filterContext.Result = new RedirectToRouteResult(redirectTargetDictionary); } } 

Answer 3

我知道我晚了一点，但我用veggerby的解决scheme，并build立了一个可能有用的帮手类，所以我想在这里提供：

 public static class ActionFilterHelpers { public static void Redirect(this ActionExecutingContext filterContext, String controller, String action, object routeValues) { filterContext.Result = Redirect(controller, action, routeValues); } public static ActionResult Redirect(String controller, String action, object routeValues) { var routeValues = new RouteValueDictionary(); routeValues["controller"] = controller; routeValues["action"] = action; foreach (var keyValue in new ObjectDictionary(routeValues)) routeValues.Add(keyValue.Key, keyValue.Value); return new RedirectToRouteResult(routeValues); } } 

我提供了一个返回一个redirectActionResult的静态方法和一个扩展了filterContext的扩展方法。 希望有人认为这有用。

ObjectDictionary是一个类，它使用reflection来创build一个字典，从它的构造对象的属性。 我没有包含这些代码，因为我相信在框架的某个地方有更好的方法。 我还没有find它，但我不希望别人inheritance我的潜在错误。

Answer 4

安全/授权/authenticationfilter应该使用AuthorizeAttribute和IAuthorizationFilter 。

 public class IsGuestAttribute: AuthorizeAttribute, IAuthorizationFilter { public void OnResultExecuted(ResultExecutedContext filterContext) { } public void OnActionExecuting(ActionExecutingContext filterContext) { if (!Ctx.User.IsGuest) { filterContext.Result = new RedirectToRouteResult( new RouteValueDictionary { { "controller", "Home" }, { "action", "Index" } }); } } } 

Answer 5

用法： filterContext.RedirectToAction("Login", "Account");

这里有一个帮助类，我写了一些扩展方法写在更多的地方提供RedirectToActionfunction。 对于OP来说这太晚了，但是希望它能帮助别人！

 public static class RedirectHelper { // RedirectToAction Extension Methods public static void RedirectToAction(this HttpResponseBase response, String action, String controller, object routeValues = null, bool endResponse = false) { response.RedirectToRoute(CreateRoute(action, controller, routeValues)); if (endResponse) response.End(); } public static void RedirectToAction(this HttpResponse response, String action, String controller, object routeValues = null, bool endResponse = false) { response.RedirectToRoute(CreateRoute(action, controller, routeValues)); if (endResponse) response.End(); } public static void RedirectToAction(this ActionExecutingContext filterContext, String action, String controller, object routeValues = null, bool endResponse = false) { if (endResponse) filterContext.HttpContext.Response.RedirectToAction(action, controller, routeValues, true); else filterContext.Result = new RedirectToRouteResult(CreateRoute(action, controller, routeValues)); } public static void RedirectToAction(this ExceptionContext filterContext, String action, String controller, object routeValues = null, bool endResponse = false) { if (endResponse) filterContext.HttpContext.Response.RedirectToAction(action, controller, routeValues, true); else { filterContext.ExceptionHandled = true; filterContext.Result = new RedirectToRouteResult(CreateRoute(action, controller, routeValues)); } } // Route Value Derivation public static RouteValueDictionary CreateRoute(String action, String controller, object routeValues = null) { RouteValueDictionary result = routeValues != null ? HtmlHelper.AnonymousObjectToHtmlAttributes(routeValues) : new RouteValueDictionary(); result["controller"] = controller; result["action"] = action; return result; } } 

有更多的ControllerContexts不包括在内，但是根据你的需要添加你自己的控件应该相当容易。