//查询
        public ActionResult key(string keytxt)
        {
            ViewData["keytxt"] = keytxt;
            var showstxt = dbconn.movie集.First(m => m.title == keytxt);
            ViewData.Model = showstxt;
            return View();
        }
//上面传值没有问题，就是不知道怎么dbconn.movie集里查记录,如以下
//sql:select * from Cemetery where province like '%北京%'

var query= db.Table.Where(m=>m.province.IndexOf("北京"));//>>sql '%北京%"

var query=db.Table.Where(m=>m.province.StartsWith("北京"));//>>sql "北京%"

var query=db.Table.Where(m=>m.province.EndWith("北京"));//>>sql "%北京"

------解决方案--------------------
bool b = (from a in _ary
  select a).Contains("");