/// <summary>        /// 判断字符串全部是否是中文。返回true 则表示含有非中文        /// </summary>        /// <param name="str_chinese"></param>        /// <returns></returns>        public bool IsChinese(string str_chinese)        {            bool b = false;            for (int i = 0; i < str_chinese.Length; i++)            {                Regex reg = new Regex(@"[\u4e00-\u9fa5]");                if (!reg.IsMatch(str_chinese[i].ToString()))                {                    b = true;                    break;                }            }            return b;        }