private void loadDdlPurchasOrder()
    {
        PurchaseOrderXMLReader xmlReader      = new PurchaseOrderXMLReader();
        List <String>          purchaseOrders = xmlReader.getFileNames();

        ddlPurchaseOrder.DataSource = purchaseOrders;
        ddlPurchaseOrder.DataBind();
    }
    protected void btnSend_Click(object sender, EventArgs e)
    {
        PurchaseOrderXMLReader xmlReader  = new PurchaseOrderXMLReader();
        String purchaseOrder              = xmlReader.getXmlFile(ddlPurchaseOrder.SelectedValue);
        PurchseOrderXMLManager xmlManager = new PurchseOrderXMLManager(purchaseOrder, ddlPurchaseOrder.SelectedValue);

        xmlManager.sendPurchaseOrderToSupplier();
        xmlManager.moveXMLDocToArchive();
        loadDdlPurchasOrder();
        getXmlData(ddlPurchaseOrder.SelectedValue);
        lblMsg.Text = "Message sent and purchase order moved to archive directory.";
    }
    private void getXmlData(String xmlFile)
    {
        PurchaseOrderXMLReader xmlReader = new PurchaseOrderXMLReader();

        if (xmlFile != null || xmlFile != "")
        {
            XmlDataSource1.DataFile = xmlReader.getXmlFile(xmlFile);
            XmlDocument doc = XmlDataSource1.GetXmlDocument();
            XmlNodeList manufacturerName = doc.GetElementsByTagName("name");
            lblCompanyName.Text  = manufacturerName[0].InnerXml;
            XmlDataSource1.XPath = "/PurchaseOrder/items/PurchaseOrderItem";
            XmlDataSource1.DataBind();
        }
    }