数组和List以指定的方式拼接成字符串类型

  /// <summary>
        /// list转换成格式的字符串
        /// </summary>
        /// <param name="param">拼接格式字符串</param>
        /// <param name="list"></param>
        /// <returns></returns>
        public string GetStrFromList(string param, List<string> list)
        {

            return list.Count >  ? String.Join(param, list)
                : string.Empty;
        }
        /// <summary>
        /// 数组转换成指定格式的字符串
        /// </summary>
        /// <param name="param">拼接格式字符串</param>
        /// <param name="list"></param>
        /// <returns></returns>
        public string GetStrFromList(string param, string[] strArr)
        {
            return strArr.Length >  ? String.Join(param, strArr)
                : string.Empty;
        }