public void Show_Report(string rpt_name, DataSet ds, int tableno, DateTime fromdate, DateTime todate)
    {
        module_Rpt.rpt_name = rpt_name;
        Report_Viewer rpt = new Report_Viewer(fromdate, todate, ds, tableno);

        rpt.Show();
    }
    public void Show_Report(string rpt_name, DataSet ds, int tableno)
    {
        module_Rpt.rpt_name = rpt_name;
        Report_Viewer rpt = new Report_Viewer(ds, tableno);

        rpt.Show();
    }