Going to different page causes view data to become null

[John]

Hi, im using ASP.NET MVC 2 with a Telerik Grid. The grid itself displays the data well enough, and i am using server binding. When i try to go to a different page, Ive discovered that my view data nulls itself.

Here is the databinding part of my grid:
<code> DataBinding(d => d.Server().Select("Index", "Manifest", new {mivm = (ManifestIndexViewModel)ViewData["ManifestIndexSearchModel"], id = -3, postback = 0})) </code>

And the controller action is:
<code>
public ActionResult Index(ManifestIndexViewModel mivm, int id = 0, int postback = 0)
        {
            var fromDt = mivm.FromDate ?? new DateTime(1900, 1, 1);
            var toDt = mivm.ToDate ?? new DateTime(2099, 12, 31);

            mivm.DetermineSearchParam();

            switch (id)
            {
                case -3:
                    break;
                case -2:
                    //Field offices changed
                    mivm.FacilityId = 0;
                    break;
                case -1:
                    mivm.FieldOfficeId = 0;
                    mivm.FacilityId = 0;
                    //Company changed)
                    break;
                case 0:
                    //First time on screen
                    mivm = new ManifestIndexViewModel("",
                                                      0,
                                                      0,
                                                      0,
                                                      new DateTime(1900, 1, 1),
                                                      new DateTime(2099, 12, 31),  
                                                      _icdp.GetAllCompanies(),
                                                      _ifodp.GetAllFieldOffices(),
                                                      _ifdp.GetAllFacilities());
                    break;
                case 1:
                    if (mivm.ManifestPartialId == "" &&
                   mivm.CompanyId == 0 && mivm.FieldOfficeId == 0 && mivm.FacilityId == 0 &&
                   fromDt == new DateTime(1900, 1, 1) && toDt == new DateTime(2099, 12, 31))
                        {
                            id = 0;
                        }
                    else
                    {
                        mivm.Manifests = _imdp.GetManifestByViewModel(mivm);
                    }
                    break;
                default:
                    break;
            }

            //Will always have to reset the lists.
            mivm.Companies = _icdp.GetAllCompanies();
            mivm.FieldOffices = _ifodp.GetFieldOfficesForCompany(mivm.CompanyId);
            mivm.Facilities = _ifdp.GetFacilityForFieldOffice(mivm.FieldOfficeId);

            ViewData["ManifestIndexSearchModel"] = mivm ?? null;

            return View(mivm);
        }
</code>

I cant quite track the problem. Any insights?

[Atanas Korchev]

Hello John,

 What happened when you put a break point in the Index method? Did it get hit? I tried a simpler setup but ViewData was correctly populated. I am sending my test project as attachment.

Regards,
Atanas Korchev
the Telerik team