public int editsv(string masv, string ghichu)
        {
            QLDangKyMonHocDataContext ql = new QLDangKyMonHocDataContext();
            int ab = ql.editsvkodk(masv, ghichu);

            return(ab);
        }
        public IEnumerable <dynamic> loadda()
        {
            QLDangKyMonHocDataContext ql = new QLDangKyMonHocDataContext();
            var ab = ql.dskhongdk();

            return(ab);
        }
 public void deletesvkodk(string masv)
 {
     QLDangKyMonHocDataContext ql = new QLDangKyMonHocDataContext();
     int ab = ql.deletesvkodk(masv);
 }