public void PopulateLocation()
        {
            IEnumerable <SiteViewModel> siteViewModels = AutoMapper.Mapper.Map <IEnumerable <SiteViewModel> >(_ldapService.GetAllSites());

            List <SelectListItem> siteViewModelList = siteViewModels.Select(siteViewModel => new SelectListItem {
                Value = siteViewModel.Name, Text = siteViewModel.Name
            }).OrderBy(t => t.Text).ToList();

            SelectList locationSelectList = new SelectList(siteViewModelList, "value", "text");

            ViewData["sites"] = locationSelectList;
        }