partial void UpdateSinger(Singer instance);
 partial void DeleteSinger(Singer instance);
 partial void InsertSinger(Singer instance);
 public ActionResult ModSinger(int sid,Singer singer)
 {
     if (ModelState.IsValid)
     {
         try
         {
             TianLaiDBDataContext db = new TianLaiDBDataContext();
             singer = db.Singer.SingleOrDefault(d => d.Sid == sid);
             UpdateModel(singer);
             db.SubmitChanges();
             return Content("<label style='color:#35006A'>操作成功!</label>");
         }
         catch (Exception ex)
         {
             ex.ToString();
             return Content("<label style='color:Red'>操作失败!</label>");
         }
     }
     else
     {
         return View(singer);
     }
 }
 partial void DeleteSinger(Singer instance);
 partial void UpdateSinger(Singer instance);
 partial void InsertSinger(Singer instance);