从ActionFilter返回视图

Question

我有一个ActionFilter来检查URL中的参数是否有效.如果它无效,我必须渲染一个视图.我不想重定向,因为我仍然需要ActionExecutingContext.可以这样做吗？

    public override void  OnActionExecuting(ActionExecutingContext filterContext)
    {
        Guid processIdentifier = (Guid)filterContext.RouteData.Values["processIdentifier"];
        //if processIdentifier  not found render a view with message and some other objects in ViewData
        filterContext.Controller.ViewData.ModelState.AddModelError("WrongProcessIdentifier", "The process-id you supplied is not valid");
        base.OnActionExecuting(filterContext);
    }

Answer 1

HandleErrorAttribute 得到了我想要的东西.

filterContext.Result = new ViewResult
            {
                ViewName = "MessagePage",
                ViewData = filterContext.Controller.ViewData,
                TempData = filterContext.Controller.TempData
            };