如何在ActionFilterAttribute中設置ViewBag的值ASP MVC 5？

Question

你好我想爲我的應用程序中的每個控制器創建自定義的ActionFilterAttribute，這個屬性應該設置一些ViewBag值。 ActionFilterAttribute對於它以及如何訪問ActionFilterAttribute中的viewbag會很好嗎？

Answer 1

你可以這樣做

public class SomeMsgAttribute : FilterAttribute, IResultFilter 
{ 
     public void OnResultExecuted(ResultExecutedContext filterContext) 
     { 
     } 

     public void OnResultExecuting(ResultExecutingContext filterContext) 
     { 
      filterContext.Controller.ViewBag.Msg= "Hello"; 
     } 
} 

使用：

[SomeMsg] 
public ActionResult Index() 
{ 
    return View(); 
} 

Answer 2

試試這個

public class CustomFilterAttribute : ActionFilterAttribute 
{ 
    public override void 
    OnActionExecuting(ActionExecutingContext filterContext) 
    { 
     // get the view bag 

     var viewBag = filterContext.Controller.ViewBag; 

     // set the viewbag values 
     viewBag.CustomValue = "CustomValue"; 
    } 
} 

Answer 3

要從不同的控制器操作傳輸數據

public override void OnActionExecuting(ActionExecutingContext filterContext) 
{ 
    EmployeeTrackingSystemAndMISEntities db = new EmployeeTrackingSystemAndMISEntities(); 

    var UserCookie = filterContext.HttpContext.Request.Cookies["UserUniqueID"]; 


    RouteValueDictionary redirectTargetDictionary = new RouteValueDictionary(); 
    redirectTargetDictionary.Add("action", "UserLogIn"); 
    redirectTargetDictionary.Add("controller", "Login"); 

    var TempData = filterContext.Controller.TempData; 
    TempData["Status"] = "Please log in as Admin"; 

    filterContext.Result = new RedirectToRouteResult(redirectTargetDictionary); 

}