关于控件绑定字段的固定长度显示问题

CS代码：

        public static string comment(string data, int len)
        {
            if (data.Length > len)
            {
                data = data.Substring(0, len) + "...";
                return data;
            }
            else
            {
                return data;
            }

        }

 

HTM代码：

        <%#comment(Eval("rev_Content","{0:C}"), 11) %>