用字节方式编码进行读取行. 关键代码

        private Encoding fileEncoding = Encoding.GetEncoding("GB2312");

                    using (StreamReader sr = new StreamReader(fullName, fileEncoding ))                    { while ((line = sr.ReadLine()) != null)                        {                            count++;                                            byte[] bytes = fileEncoding.GetBytes(line);//extractBytes(line);                                            int nextStart = 0;                                                    int iLen = lineArray[j].Length;                                                    if (j == 0)                                                    {                                                        scl.rq = fileEncoding.GetString(bytes, 0, iLen);                                                        nextStart = 0 + iLen+1;                                                    }