将TempData从动作过滤器传递到动作 [英] Passing TempData from action filter to action

问题描述

我一直在尝试使用以下命令将TempData从ActionFilter传递到动作:

I've been trying to pass TempData from ActionFilter to the action using :

filterContext.Controller.TempData.Add("Key","Value");

但是，随着我不断收到Object not referenced to an instance of the object错误，似乎没有将TempData传递给该动作.

However, it appears that no TempData is passed to the action as I keep getting the Object not referenced to an instance of the object error.

这是从ActionFilter传递TempData到控制器的正确方法吗?如果没有，我该怎么办?

Is this the right way to pass TempData to the controller from the ActionFilter ? if not, how can I do this ?

推荐答案

这将有效:-

答案1:

过滤器:-

public class MyCustomAttribute : ActionFilterAttribute
{
  public override void OnActionExecuting(ActionExecutingContext filterContext)
  {
    filterContext.RouteData.Values.Add("Key","Value");
  }
}

控制器:-

[MyCustom]
public ActionResult Index()
{
    TempData["Key"] = RouteData.Values["Key"];

    return View();
}

答案2:

过滤器:-

public class MyCustomAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        filterContext.Controller.TempData.Add("Key","Value");
    }
}

控制器:-

[MyCustom]
public ViewResult Index()
{
    string Tempval = TempData["Key"].ToString();
    return View();
}

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