判断字符串是否是null 或 trim() == "" - IsNullOrEmptyAndBlankString

2017-02-05 10:42:14 访问(1375) 赞(0) 踩(0)


        /// <summary>
        /// 判断字符串是否是null 或 trim() == ""
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsNullOrEmptyAndBlankString(string str)
        {
            if (str == null)
                return true;

            if (str.Length == 0)
                return true;

            if (str.Trim().Length == 0)
                return true;

            return false;
        }

        /// <summary>
        /// 判断字符串是否不是null 或 trim() == ""
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsNotNullOrEmptyAndBlankString(string str)
        {
            return !IsNullOrEmptyAndBlankString(str);
        }