MVC5 方法扩展

public static MvcHtmlString DataDictionaryDropDownList(this HtmlHelper htmlHelper, string name, object htmlAttributes, List<SelectListItem> selectListItem)
        {
            return SelectExtensions.DropDownList(htmlHelper, name, selectListItem, htmlAttributes);
        }

        public static MvcHtmlString DataDictionaryDropDownList(this HtmlHelper htmlHelper, string name, string dataKeyName, object htmlAttributes, string checkedValue = null, IDataDictionaryAdapter adapter = null, params SelectListItem[] moreSelectItem)
        {
            //默认适配器
            if (adapter == null) adapter = new DataDictionaryAdapter();

            List<SelectListItem> selectListItem = adapter.GetSelectListItem(dataKeyName, checkedValue);

            //添加更多选择
            if (moreSelectItem != null) selectListItem.InsertRange(0, moreSelectItem);

            return DataDictionaryDropDownList(htmlHelper, name, htmlAttributes, selectListItem);
        }
        public static MvcHtmlString DataDictionaryDropDownList<T>(this HtmlHelper htmlHelper, string name, string dataKeyName, object htmlAttributes, string checkedValue = null, IDataDictionaryAdapter adapter = null, Action<T> beforeAction = null, params SelectListItem[] moreSelectItem)
        {
            //默认适配器
            if (adapter == null) adapter = new DataDictionaryAdapter();

            List<SelectListItem> selectListItem = adapter.GetSelectListItem<T>(dataKeyName, checkedValue, beforeAction);

            //添加更多选择
            if (moreSelectItem != null) selectListItem.InsertRange(0, moreSelectItem);

            return DataDictionaryDropDownList(htmlHelper, name, htmlAttributes, selectListItem);
        }

        public static MvcHtmlString ActionLink2(this HtmlHelper htmlHelper, string linkText, string actionName, object routeValues, object htmlAttributes)
        {
            MvcHtmlString result = LinkExtensions.ActionLink(htmlHelper, linkText, actionName, routeValues, htmlAttributes);
            return HtmlDecode(result);
        }
        public static MvcHtmlString ActionLink2(this HtmlHelper htmlHelper, string linkText, string actionName, string controllerName, object htmlAttributes)
        {
            MvcHtmlString result = LinkExtensions.ActionLink(htmlHelper, linkText, actionName, controllerName, null, htmlAttributes);
            return HtmlDecode(result);
        }
        public static MvcHtmlString ActionLink2(this HtmlHelper htmlHelper, string linkText, string actionName, string controllerName, object routeValues, object htmlAttributes)
        {
            MvcHtmlString result = LinkExtensions.ActionLink(htmlHelper, linkText, actionName, controllerName, routeValues, htmlAttributes);
            return HtmlDecode(result);
        }

        private static MvcHtmlString HtmlDecode(MvcHtmlString mvcHtmlString)
        {
            return new MvcHtmlString(HttpUtility.HtmlDecode(mvcHtmlString.ToHtmlString()));
        }