public DataTable TimPhiTheoThang(DateTime Ngay) { var dh = from p in dbs.F_TimPhiThang(Ngay) select p; if (dh != null) { SqlCommand cmd = (SqlCommand)dbs.GetCommand(dh); DataTable dt = new DataTable(); SqlDataAdapter da = new SqlDataAdapter(cmd); da.Fill(dt); return(dt); } else { return(null); } }