BKI_DichVuMatDat.BaoCao.f491_rpt_bao_cao_tong_hop_thu_nhap_theo_nam.m_txt_nam_KeyPress C# (CSharp) Метод

        private void m_txt_nam_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!Char.IsDigit(e.KeyChar) && !Char.IsControl(e.KeyChar))
            {
                e.Handled = true;
            }
        }