protected void btnExport_Click(object sender, EventArgs e)
    {
        string directoryPath = Server.MapPath(string.Format("~/{0}/", "XML"));

        if (!Directory.Exists(directoryPath))
        {
            Directory.CreateDirectory(directoryPath);
        }

        CreateXML("tbl_art");
        CreateXML("tbl_art2");
        CreateXML("tbl_care");
        CreateXML("tbl_gendnorm");
        CreateXML("tbl_hivi");
        CreateXML("tbl_htc1");
        CreateXML("tbl_htc2");
        CreateXML("tbl_htc3");
        CreateXML("tbl_lab");
        CreateXML("tbl_lab2");
        CreateXML("tbl_ovc");
        CreateXML("tbl_pep");
        CreateXML("tbl_pmtct");
        CreateXML("tbl_pp");
        CreateXML("tbl_tb1");
        CreateXML("tbl_tb2");
        CreateXML("tbl_tb3");
        CreateXML("tbl_training");

        ComboBox1.ClearSelection();
        TextBox15.Text = string.Empty;

        // Response.Write("<script language=javascript>alert('Export to Xml Successfull...  ');</script>");
        ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Export to Xml Successfull...');", true);
        return;
    }