private IPagedList<LibraryItem> GetLibraryItemsArrivals()
 {
     var mediatheekArrivalSearch = new MediatheekSimpleSearch
     {
         LibraryCode = "MAR",
         SearchField = "css",
         ItemsPerPage = 20,
         Offset = 0,
         SortOrder = MediatheekSortOrder.Relavance
     };
     
     var model = _mediatheekService.GetLibraryItemsBySimpleSearch(mediatheekArrivalSearch);
     return model;
 }
 //Construct SimpleSearch Url
 private string ConstructSimpleSearchUrl(MediatheekSimpleSearch search)
 {
     if (search.SearchField == null || search.SearchField == String.Empty)
     {
         return null;
     }
     string searchFields = "zk#" + "search_callback" + "#" + search.LibraryCode + "#" + search.Offset + "#" + search.ItemsPerPage + "#s" + (int)search.SortOrder + "s#" + search.SearchField + "    ";
     return ConstructURL(searchFields);
 }
        public IPagedList<LibraryItem> GetLibraryItemsBySimpleSearch(MediatheekSimpleSearch search)
        {
            string url = ConstructSimpleSearchUrl(search);
            if(url == null)
            {
                return null;
            }

            using (HttpClient client = new HttpClient())
            {
                string result = client.GetStringAsync(url).Result;
                if (result == null)
                    return null;

                int page = Convert.ToInt32(Math.Floor(Convert.ToDecimal(search.Offset/search.ItemsPerPage) + 1));

                return ConvertSimpleSearchToPagedList(result, page, search.ItemsPerPage);
            }
        }