private void Manage()
    {
        string result = BillingPurchaseVoucherBAL.Manage(Request.QueryString, Request.Form);
        var    billingPurchaseVoucher = new BillingPurchaseVoucher {
            BPRID = Convert.ToInt32(result.Split(',')[0]),
            BPRNo = Convert.ToInt32(result.Split(',')[1])
        };

        Response.Write(billingPurchaseVoucher.ToJSON());
    }