public ActionResult Index(string sortOrder, string 客戶分類 = "", int page = 1)
        {
            // 測試多國語系 - .Net程式依語系取得資源內容 - 在 Controller/Action 套用多國屬性設定值
            ViewBag.Query = App_GlobalResources.Resource.Query;

            int currentPage        = page < 1 ? 1 : page;
            IQueryable <客戶資料> data = null;

            if (string.IsNullOrEmpty(客戶分類))
            {
                data = repo.Get列表所有客戶資料();
            }
            else
            {
                data = repo.Get列表所有客戶資料()
                       .Where(c => c.客戶分類.ToUpper() == 客戶分類.ToUpper());
            }

            // *** 實作排序功能(點選同一欄位切換下一次搜尋條件,回傳給 View 紀錄下來) Begin ***
            // 先實作2個欄位排序:客戶名稱 & 統一編號
            ViewBag.CNameSortParm   = String.IsNullOrEmpty(sortOrder) ? "cname_desc" : "";
            ViewBag.CNumberSortParm = sortOrder == "cnumber" ? "cnumber_desc" : "cnumber";

            switch (sortOrder)
            {
            case "cname_desc":
                data = data.OrderByDescending(c => c.客戶名稱);
                break;

            case "cnumber":
                data = data.OrderBy(c => c.統一編號);
                break;

            case "cnumber_desc":
                data = data.OrderByDescending(c => c.統一編號);
                break;

            default:
                data = data.OrderBy(c => c.客戶名稱);
                break;
            }
            // *** 實作排序功能(點選同一欄位切換下一次搜尋條件,回傳給 View 紀錄下來) Begin ***

            //return View(data.ToList());
            var result = data.ToPagedList(currentPage, pageSize);

            return(View(result));
        }