去除不可见字符

 

 

        /// <summary>
        /// 去除不可见字符
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string DeleteDisplayChars(string str)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < str.Length; i++)
            {
                int Unicode = str[i];
                if (!(Unicode <= 31 || Unicode == 127))
                {
                    sb.Append(str[i].ToString());
                }
            }
            return sb.ToString();
        }