protected void btnThem_Click(object sender, EventArgs e) { var thang = cmbThang.Value; var nam = cmbNam.Value; MTCSYT.SYS_Session session = (MTCSYT.SYS_Session)Session["SYS_Session"]; DataTable ds = db.SELECT_TRAM_HATHE_UT_TT_DS(session.User.ma_dviqlyDN, thang + "", nam + ""); grdKH.DataSource = ds; grdKH.DataBind(); }