去除HTML格式 截取字符串

  //截取部分内容方法
        public static string strvalue(string value, int length)
        {
            string strValue = NoHTML(value);// 去除HTML标记
            if (strValue.Length > length)
            {
                return strValue.Substring(0, length) + "...";
            }
            else
            {
                return strValue;
            }
        }
        #region 回车,空格过滤
        /**/
        /// <summary>
        /// 去除HTML标记
        /// </summary>
        /// <param name="NoHTML">包括HTML的源码 </param>
        /// <returns>已经去除后的文字</returns>
        public static string NoHTML(string Htmlstring)
        {
            //删除脚本
            Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "",
            RegexOpti