ASP.NET MVC ActionFilter 参数绑定

Question

如果动作方法中有模型绑定参数，如何在动作过滤器中获取该参数？

[MyActionFilter]
public ActionResult Edit(Car myCar)
{
    ...
}

public class MyActionFilterAttribute : ActionFilterAttribute
{
    public void OnActionExecuted(ActionExecutedContext filterContext)
    {
        //I want to access myCar here
    }

}

有没有办法在不通过 Form 变量的情况下获取 myCar？

Answer 1

不确定 OnActionExecuted 但您可以在 OnActionExecuting 中进行：

public class MyActionFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        // I want to access myCar here

        if(filterContext.ActionParameters.ContainsKey("myCar"))
        {
            var myCar = filterContext.ActionParameters["myCar"] as Car;

            if(myCar != null)
            {
                // You can access myCar here
            }
        }
    }
}