Asp.Net MVC 利用ReflectedActionDescriptor判断Action返回类型

System.Web.Mvc.ReflectedActionDescriptor descriptor = filterContext.ActionDescriptor as

System.Web.Mvc.ReflectedActionDescriptor;
if (descriptor != null)
{
Type actionType =descriptor.MethodInfo.ReturnType;
if (actionType.Equals(typeof(ActionResult)))
{
if (actionType.IsSubclassOf(typeof(JsonResult)))
{
Response.Write("JsonResult");
}
else if (actionType.IsSubclassOf(typeof(ContentResult)))
{
Response.Write("ContentResult");
}
else
{
Response.Write("ViewResult");
}
}
else
{
if (actionType.Equals(typeof(JsonResult)))
{
Response.Write("JsonResult");
}
else if (actionType.Equals(typeof(ContentResult)))
{
Response.Write("ContentResult");
}
else
{
Response.Write("ViewResult");
}
}
}