private void ShowWorked()
 {
     if (Request.QueryString["Mid"] != null)
     {
         string Mid = Request.QueryString["Mid"].ToString();
         string Snum =Request.Cookies["StudentCookies"].Values["Snum"].ToString();
         LearnSite.BLL.Works ws = new LearnSite.BLL.Works();
         GVwork.DataSource = ws.MyMissonWorks(Int32.Parse( Mid), Snum);// ws.MyHowWorks(Int32.Parse(Cid), Snum);
         GVwork.DataBind();
     }
 }