RequestHelper

Request["param"] 全部
 Request.QueryString["param"] get
 Request.Form["param"] post

 public static string Query(string key)
        {
            string str = HttpContext.Current.Request.QueryString[key];

            if (String.IsNullOrEmpty(str)||str.Equals("null"))
            {
                return "";
            }

            return HttpUtility.UrlDecode(Safe(str.Trim()));
        }