在构建自定义ASP中。MVC 3 操作筛选器,如果我的测试失败,我应该如何将用户重定向到另一个操作?我想传递原始操作,以便在用户输入缺少的首选项后重定向回原始页面。
在控制器中:
[FooRequired]
public ActionResult Index()
{
// do something that requires foo
}
在自定义筛选器类中:
// 1. Do I need to inherit ActionFilterAttribute or implement IActionFilter?
public class FooRequired : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (TestForFoo() == false)
{
// 2. How do I get the current called action?
// 3. How do I redirect to a different action,
// and pass along current action so that I can
// redirect back here afterwards?
}
// 4. Do I need to call this? (I saw this part in an example)
base.OnActionExecuting(filterContext);
}
}
我正在寻找一个简单的ASP。MVC 3 筛选器示例。到目前为止,我的搜索已经导致了Ruby on Rails示例或ASP。MVC 过滤器示例比我需要的要复杂得多。如果之前有人问过这个问题,我深表歉意。
下面是使用我自己的重定向过滤器之一的小代码示例:
public class PrelaunchModeAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
//If we're not actively directing traffic to the site...
if (ConfigurationManager.AppSettings["PrelaunchMode"].Equals("true"))
{
var routeDictionary = new RouteValueDictionary {{"action", "Index"}, {"controller", "ComingSoon"}};
filterContext.Result = new RedirectToRouteResult(routeDictionary);
}
}
}
如果要截获路由,可以从 ActionExecutingContext.RouteData 成员处获取。
使用该路由数据成员,您可以获取原始路由:
var currentRoute = filterContext.RouteData.Route;
等。。。这有助于回答您的问题吗?
filterContext.Result
设置为RedirectToRouteResult
:
filterContext.Result = new RedirectToRouteResult(...);