protected void Page_Load(object sender, EventArgs e)
        {
            DataQLNSDataContext conn = new DataQLNSDataContext(@"Data Source=DESKTOP-QO35TO8\SQLEXPRESS;Initial Catalog=QuanLyNhanSu;Integrated Security=True");
            var myQuery = from i in conn.tblNhanViens
                          select i;

            gvNhanVien.DataSource = myQuery;
            gvNhanVien.DataBind();
            gvNhanVien1.DataSource = myQuery;
            gvNhanVien1.DataBind();
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            DataQLNSDataContext conn = new DataQLNSDataContext(@"Data Source=DESKTOP-QO35TO8\SQLEXPRESS;Initial Catalog=QuanLyNhanSu;Integrated Security=True");
            string manv    = Application["manv"].ToString();
            var    myQuery = from i in conn.tblNhanViens
                             where i.MaNV == manv
                             select i;

            if (myQuery.Count() == 0)
            {
                return;
            }
            tblNhanVien itemnv = myQuery.First();
        }