after calling controller method load xml file and create dynamic controls based on XML file in ASP.NETMVC View

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ASP.NET

MVC

Hi currently I am working on one project this project in ASP.NETMVC based .
so need some assistance about bellow details


I have designed 1 View , and that view contains 3 html dropdown

these 3 dorpdown fill based one first dopdown option selection
like if i select 1st dropdown option then fill 2nd dropdown same as third dropdown.

my problem is that

when i am selecting third drop-down option then have called to XYZ controller method

Like

[HttpPost]
public ActionResult xyz()
{
XElement xml = XElement.Load(Server.MapPath("~/XmlMaster/CompanyLocation.xml"));
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(Server.MapPath("~/XmlMaster/CompanyLocation.xml"));
XmlElement root = xmlDoc.DocumentElement;
TempData["xml"] = xml;
TempData["xmlDoc"] = xmlDoc;
Session["FileName"] = "CompanyLocation.xml";
FirmographicInformation();
return View("FirmographicInformation");//"FirmographicInformation"
}
xyz method call to Index Method
public ActionResult Index()
{
if (Session["FileName"] != null && Session["FileName"].ToString().Trim() != "")
{
string filename = Session["FileName"].ToString().Trim();
XElement xml = XElement.Load(Server.MapPath("~/XmlMaster/" +filename));
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(Server.MapPath("~/XmlMaster/" +filename));
XmlElement root = xmlDoc.DocumentElement;
TempData["xml"] = xml;
TempData["xmlDoc"] = xmlDoc;
Session["FileName"] = null;
return View();
}
}

then after disply view
here i have designed one html table with dynamically generated control based on XMl file

for eg

<% var listItems_Prefix = new List<SelectListItem>();
SelectList selectList = new SelectList(listItems_Prefix, "Value", "Text");
XElement xml = (XElement)TempData["xml"];
System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
xmlDoc = (System.Xml.XmlDocument)TempData["xmlDoc"]; %>




<%
if (xmlDoc != null)
{
System.Xml.XmlElement root = xmlDoc.DocumentElement;
System.Xml.XmlNodeList controls = root.ChildNodes;

for (int i = 0; i < controls.Count; i++)
{

<%:Html.TextBox(controls[i].Attributes["id"].Value.ToString().Trim(), "")%>

}

now my problem is that
after return on view this code not executed and dynamic controls not adding on view page, and if i refresh page then my Index controller method will recall and display my expected result


so please help me regarding on that


Thank You...