// gvsub voucher code
        private void loadDataGVSubVoucher(int id, int mainvoucehrid)
        {
            var data = SBLL.LoadSubVoucherData(id, mainvoucehrid);

            GVSubVoucher.DataSource = data;
            GVSubVoucher.DataBind();
        }
        private void clearCntrol_SUbVoucher()
        {
            this.ViewState["CurrentData"] = null;
            DataTable dt = new DataTable();

            GVSubVoucher.DataSource = dt;
            GVSubVoucher.DataBind();
            GVSubVoucher.SelectedIndex = -1;
            loadDataGVMainVoucher(0);
            loadDataGVSubVoucher(0, 0);
            GernerateSubVoucherCode();
            txtSubVNAME.Text = "";
            // txtSubVNO.Text = "";
            BtnSubVoucheerSave.Text = "Save";
        }