[Solved] How to update viewdata in mvc user control

[Azeheruddin khan]

Dear All,

I am calling mvc web user control. In that i am having viewdata, dropdown and Apply button. I am loading dropdown using json.  sending Selected value from dropdown to contoller using jquery. every thing is working fine till here. But viewdata is not showing new assigned value. 

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<dynamic>" %>

    <h2>

        Change Facility</h2>

   <b>Facilty Name :</b><div id = "FacilityName"><%: ViewData["FaciltyName"]%></div><br />

    <br />

<b>Facility:</b>

<%= Html.Telerik().DropDownList()

                                .Name("facility")

                                .DataBinding(binding => binding.Ajax().Select("GetFacility", "User"))                                                   

                                            

                                    

%>

<button id="UpdateASS" onclick="FacilityChangeUpdate()">

    Update</button>

this is my controller

[Authorize]

        public ActionResult FacilityChange()

        {

            ViewData["FaciltyName"] = Utils.GetUser(HttpContext).DefaultFacilityName;

            

            //ViewData["FacilityDropdown"] = new UserRepository().GetFacility(Utils.GetUser(HttpContext).Connection, Utils.GetUser(HttpContext).UserID); 

            return PartialView();

        }

        [Authorize]

        public ActionResult GetFacility()

        {

            var facility = new UserRepository().GetFacility(Utils.GetUser(HttpContext).Connection, Utils.GetUser(HttpContext).UserID);

            return new JsonResult { Data = new SelectList(facility, "Value", "Text") };

        }

         [Authorize, HttpPost]

        public ActionResult FacilityChange(int facilityId,string facilityName)

        {

            User user = Utils.GetUser(HttpContext);

            user.DefaultFacilityID = facilityId;

            user.DefaultFacilityName = facilityName;

            ViewData["FaciltyName"] = null;

            //ViewData["FacilityDropdown"] = new UserRepository().GetFacility(Utils.GetUser(HttpContext).Connection, Utils.GetUser(HttpContext).UserID); 

            return PartialView();

        }

best rgds
Azeheruddin khan