private void _CargarDetalleImportacion()
        {
            var BE = new tb_cm_liquidadet();
            var BL = new tb_cm_liquidadetBL();
            var dt = new DataTable();

            BE.tipdoc = tipdoc.Text.Trim();
            BE.serdoc = moduloiddes.SelectedValue.ToString();

            var n_doc = string.Empty;
            if (numdoc.Text.Trim().Length > 0)
            {
                n_doc = numdoc.Text.Trim().PadLeft(6, '0');
            }
            BE.numdoc = serdoc.Text.ToString().Trim() + n_doc.ToString().Trim();

            dt = BL.GetAll(EmpresaID, BE).Tables[0];
            if (dt.Rows.Count > 0)
            {
                dgb_importacion2.DataSource = dt;
            }
        }