You should pass your `AccountListFilterModel` to the view, either via `model` or using `ViewBag`\`ViewData`. 
Using the latter approach: 

**In your controller:** 

    public ViewResult Index(AccountListFilterModel accountListFilter)
    {
        ViewBag.Filter = accountListFilter;
    }

**In your view** (you can delete the code at the top of the view, that uses `Request` to get parameters.

    <a style="@(ViewBag.Filter.currentSortOrder == "UserName desc" ? "" : "display:none;")" ... />

It's a general rule of thumb that your view should not contain any logic at all, your controller should supply all the data that the view needs.