c# 字节级别分割为等长字符串数组,分割中英混合字符串为固定长度

下午闲着无聊, 帮同时解决字符对齐的问题

       /// <summary>
        /// 根据字符集,在字节级别分割为等长字符串数组
        /// create by lz 2017-11-24
        /// </summary>
        /// <param name="strcnt"></param>
        /// <param name="lenByteCount">注意这是字节长度</param>
        /// <returns></returns>
        private static string[] SubStrToSaLen(string strcnt, int lenByteCount)
        {
            List<string> lstStr = new List<string>();
            string ret_str = strcnt;



            if (ret_str.Length == 0)
            {
                return new string[] { ret_str };

            }

            byte[] byteArray = System.Text.Encoding.GetEncoding("GB2312").GetBytes(strcnt);//.GetBytes(str);
            if (byteArray.Length < lenByteCount)
                return new string[] { strcnt };
            int orgMod = (byteArray.Length / lenByteCount);
            int lenCod = byteArray.Length % lenByteCount; //余数
            if (lenCod > 0)
            {
                List<byte> lstbyte = new List<byte>();

                lstbyte.AddRange(byteArray);
                for (int i = lstbyte.Count; i < (orgMod + 1) * lenByteCount; i++)
                {
                    lstbyte.Add(32);//用空格填充成整倍数
                }
                byteArray = lstbyte.ToArray();

            }



            int lenmod = byteArray.Length / lenByteCount; //整倍数
            int start = 0;
            int nstart = 0;
            for (int i = 1; i <= lenmod; i++)
            {

                start = nstart;
                byte[] ba = new byte[lenByteCount];
                int sublen = lenByteCount;
                int nCount = 0;
                int eCount = 0;
                for (int j = 0; j < lenByteCount; j++)
                {
                    ba[j] = byteArray[start + j];
                    if (ba[j] > 127)
                        nCount++;//是汉字就统计数量
                    else
                        eCount++;

                }

                if (nCount % 2 != 0 && eCount % 2 != 0) //如果是奇数，就有半个汉字，丢失最后一个字节，
                {

                    sublen = sublen - 1;

                }
                nstart = start + sublen;//设置下一个字符开始位置
                ret_str = System.Text.Encoding.GetEncoding("GB2312").GetString(byteArray, start, sublen);
                byte[] arbyte = System.Text.Encoding.GetEncoding("GB2312").GetBytes(ret_str);
                if (arbyte.Length < lenByteCount)
                {
                    List<byte> lsttmp = new List<byte>();
                    lsttmp.AddRange(arbyte);
                    lsttmp.Add(32);
                    ret_str = System.Text.Encoding.GetEncoding("GB2312").GetString(lsttmp.ToArray());
                }
                lstStr.Add(ret_str);

            }

            return lstStr.ToArray();
        }