HtmlHelper 自定义扩展

    public static class MyHtmlHelper
    {
        public static string MyLable(this HtmlHelper htmlHelper, string str)
        {
            return string.Format("<span>{0}</span>", str);
        }

        public static MvcHtmlString MyHtmlStringLabel(this HtmlHelper helper, string str,int strLength) //扩展防止被编码化
        {
            if (str.Length> strLength)
                str= str.Substring(0, strLength) +"...";
            return new MvcHtmlString(string.Format("<span>{0}</span>", str));
        }
    }