Question

I have a problem with a ViewBag function pointer value being lost during a PostBack.

My site has a banner ( partial view ) where I indicate my customer’s status by utilizing a ViewBag function pointer:

ViewBag.CustomerStatus= new Func<id, string>(GetCustomerStatus);

(Where id is my customer’s id and returned string it’s returned status )

As I start going to other pages that utilize the banner partial view I loose my CustomerStatus ViewBag variable. I know ViewBags are only available “per page” but how can I make my Customer status function available from other places in the application without being redundant and repeating ViewBag.CustomerStatus= new Func(GetCustomerStatus); on every single ActionMethod call ?

Is it possible to have a function pointer stored in Session/ViewState? Safe ?
How can I access my up to date customer status across postbacks ?

Thank you in advance.

Answer 1

I ended up taking the following approach…

Instead of rendering partial view directly I changed it up so it’s called through an Action method of the controller.

I created:

 public PartialViewResult CustomerStatus()
 {
  ...here I called my private GetCustomerStatus methods
  ViewBag.CustomerStatus = GetCustomerStatus();
  Return PartialView("
 }

So now instead of calling a ViewBag function pointer separately, whenever the header banner has to be rendered, instead of @Html.Partial(“BannerPartialView”) I call my @Html.Action(CustomerStatus) method that returns that same banner but with the customer status variable available.

Hope it’s not to confusing and helps to someone else.