private void btnNangLuong_Click(object sender, EventArgs e)
 {
     this.bindingSourceLuong.DataSource = NhanVienControl.LayDsLuongNhanVien(dtngaynangluong.Value.ToShortDateString());
     this.reportViewerLuong.RefreshReport();
     m_NhanVienCtrl.CapNhatCanSu(dtngaynangluong.Value.ToShortDateString());
     m_NhanVienCtrl.CapNhatChuyenVien(dtngaynangluong.Value.ToShortDateString());
 }