src/System.Web.Mvc/ActionFilterAttribute.cs


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namespace System.Web.Mvc
{
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
    public abstract class ActionFilterAttribute : FilterAttribute, IActionFilter, IResultFilter
    {
        // The OnXxx() methods are virtual rather than abstract so that a developer need override
        // only the ones that interest him.

        public virtual void OnActionExecuting(ActionExecutingContext filterContext)
        {
        }

        public virtual void OnActionExecuted(ActionExecutedContext filterContext)
        {
        }

        public virtual void OnResultExecuting(ResultExecutingContext filterContext)
        {
        }

        public virtual void OnResultExecuted(ResultExecutedContext filterContext)
        {
        }
    }
}