public void getnode() { int expectnum = 0; string number = string.Empty; int id = 0; if (Request.QueryString["expectnum"] != null && Request.QueryString["number"] != null && Request.QueryString["id"] != null) { expectnum = Convert.ToInt32(Request.QueryString["expectnum"].ToString().Trim()); number = Request.QueryString["number"].ToString().Trim(); id = Convert.ToInt32(Request.QueryString["id"].ToString()); } divnode.InnerText = DeductBLL.Reason(expectnum, number, id).ToString(); }