protected void btn_approve_Click(object sender, EventArgs e)
    {
        Button              bt           = sender as Button;
        string              args         = bt.CommandArgument.ToString();
        GridViewRow         row          = bt.Parent.Parent as GridViewRow;
        string              sale_bill_no = row.Cells[1].Text.ToString();
        ProfitBudgetAdapter pba          = new ProfitBudgetAdapter();

        if (args == "Y")
        {
            pba.audit(sale_bill_no, true);
        }
        else
        {
            pba.audit(sale_bill_no, false);
        }

        GridViewBind();
    }