private void thong_ke_loai_cong_tac()
{
var v_dt = m_data_set.Tables[0].AsEnumerable();
m_lbl_chinh_thuc.Text = StringConstLoaiCongTac.CHINH_THUC + ": " + v_dt.Where(x => x.Field<string>("LOAI_CONG_TAC") == StringConstLoaiCongTac.CHINH_THUC).Count();
m_lbl_kiem_nhiem.Text = StringConstLoaiCongTac.KIEM_NHIEM + ": " + v_dt.Where(x => x.Field<string>("LOAI_CONG_TAC") == StringConstLoaiCongTac.KIEM_NHIEM).Count();
m_lbl_lam_thoi.Text = StringConstLoaiCongTac.LAM_THOI + ": " + v_dt.Where(x => x.Field<string>("LOAI_CONG_TAC") == StringConstLoaiCongTac.LAM_THOI).Count();
}