Question

I want all my pages to use have some viewdata. i need to get a client name from a querystring then based on that do some work and populate ViewData. my controller inherits from the controller created below. Request["client"] is giving System.NullReferenceException: Object reference not set to an instance of an object.

 public abstract class ApplicationController : Controller
    {

        public ApplicationController()
        {
            string client = Request["client"];
            //...etc

        }

    }

这是错误的?

感谢

Answer 1

错过的是,当你在建筑商中称呼该请求时,该请求就不存在,只有在根据你的方法采取行动时才会立即提出。

见这一问题,并探讨答案。或许对你们也是有用的

如果是使用主计长的话。 HttpContext

友情链接