从动作过滤器属性重定向

Redirect From Action Filter Attribute(从动作过滤器属性重定向)

问题描述

在 ActionFilterAttribute 中进行重定向的最佳方式是什么.我有一个名为 IsAuthenticatedAttributeFilter 的 ActionFilterAttribute 并检查了会话变量的值.如果变量为 false，我希望应用程序重定向到登录页面.我更喜欢使用路由名称 SystemLogin 进行重定向，但是此时任何重定向方法都可以.

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

带有路线名称:

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

你也可以这样做:

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

<小时>

如果你想使用RedirectToAction:

您可以在控制器上创建一个公共 RedirectToAction 方法(最好在其基本控制器上)，该方法只需从 调用受保护的 RedirectToAction>System.Web.Mvc.Controller.添加此方法允许从过滤器公开调用 your 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);
}

那么您的过滤器将如下所示:

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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