SelectList IUploadRepository.AlbumList()
        {
            var List = new SelectList(new List<SelectListItem>());
            return List;
        }

        SelectList IUploadRepository.AlbumList(string albumtype)
        {
            if (!String.IsNullOrWhiteSpace(albumtype))
            {
                var item = from x in db.Albums where x.AlbumType == albumtype && x.Account.AlbumAccount == HttpContext.Current.User.Identity.Name select x.AlbumName;
                var List = new SelectList(item);
                return List;
            }
            else
            {
                var List = new SelectList(new List<SelectListItem>());
                return List;
            }
        }

        List<String> IUploadRepository.JsonAlbumList(string albumtype)
        {
            if (!String.IsNullOrWhiteSpace(albumtype))
            {
                var List = from x in db.Albums where x.AlbumType == albumtype && x.Account.AlbumAccount == HttpContext.Current.User.Identity.Name select x.AlbumName;
                return List.ToList();
            }
            else
            {
                return new List<String>();
            }
        }

        SelectList IUploadRepository.TypeList()
        {
            var item = from x in db.Albums select x.AlbumType;
            var List = new SelectList(item.Distinct());
            return List;
        }



public ActionResult ImageUpLoad()
        {
            ViewBag.AlbumType = _UploadRepository.TypeList();
            ViewBag.AlbumName = _UploadRepository.AlbumList();
            return View();
        }


public JsonResult GetAlbum(string albumtype)
        {
            return Json(_UploadRepository.JsonAlbumList(albumtype), JsonRequestBehavior.AllowGet);
        }

$(function () {
    var typevalue = $("#Album_AlbumType").val();
    if (typevalue == "") {
        $("#Album").hide(); //隐藏
    }

    $("#Album_AlbumType").change(function () {
        var selectedvalue = $("#Album_AlbumType").val();
        var TheUrl = "/Upload/GetAlbum?albumtype=" + escape(selectedvalue); //參數值含有中文，利用escape()進行轉碼

        $.getJSON(TheUrl, null, function (data) {
            $("#Album_AlbumName").empty(); //清空下拉列表選項

            if (selectedvalue == "") {
                $("#Album").hide(); //隐藏
            }
            else {
                $("#Album").show(); //顯示
            }

            $("#Album_AlbumName").append(
                $("<option></option>", { value: "", text: "请选择" })
        );
            $.each(data, function (i, item) {
                $("#Album_AlbumName").append($("<option></option>").val(item).html(item))
            });
        });
    });
});