在线编辑器保存到字段的内容，怎么截取小弟我要的长度

        /// <summary>        /// 过滤字符串中的html代码        /// </summary>        /// <param name="Str"></param>        /// <returns>返回过滤之后的字符串</returns>        public static string LostHTML(string Str)        {            string Re_Str = "";            if (Str != null)            {                if (Str != string.Empty)                {                    string Pattern = "<\\/*[^<>]*>";                    Re_Str = Regex.Replace(Str, Pattern, "");                }            }            return (Re_Str.Replace("\\r\\n", "")).Replace("\\r", "");        }        #region 截取字符串为指定长度        public static string CutStr(string sInString, int length)        {            if (sInString == null || sInString.Length == 0) return "";            int iCount = System.Text.Encoding.GetEncoding("Shift_JIS").GetByteCount(sInString);            if (iCount > length)            {                int iLength = 0;                for (int i = 0; i < sInString.Length; i++)                {                    int iCharLength = System.Text.Encoding.GetEncoding("Shift_JIS").GetByteCount(new char[] { sInString[i] });                    iLength += iCharLength;                    if (iLength == length)                    {                        sInString = sInString.Substring(0, i + 1) + "...";                        break;                    }                    else if (iLength > length)                    {                        sInString = sInString.Substring(0, i) + "...";                        break;                    }                }            }            return sInString;        }        #endregion