Question

我有一个我想读的逗号分隔文本文件。

我一次读一行，并处理该信息。

使用下面的代码段和文件片段，当我到达以841开头的行时出现错误 - 它只会输入147个字符。

问题：导致TextReader停止拉入此行的原因是什么？它中有一些特殊的序列吗？

代码段：

int lastNum = -1;
int num = 1;
using (TextReader reader = File.OpenText(filename)) {
  do {
    string line = reader.ReadLine();
    if (!String.IsNullOrEmpty(line)) {
      string[] split = line.Split(',');
      int indexer = Convert.ToInt32(split[0]);
      Console.WriteLine("#{0}: ID '{1}' Line Length = {2}", num++, split[0], line.Length);
    }
  } while ((-1 < reader.Peek());
  reader.Close();
}

文件片段（从第0行到ProblemLine + 1）：

ID,Line,[Date],WO,Module,DSO,Integer,Unit,,Contact,Category,Problem,Solution,Action,Actor,Acted
824,,1/4/2011,589259,,170966,JC,V3A,,Tom Read,WO.3,"The unit is stainless steel, but the coil connection plates that were on the work order were not stainless steel",MTF # 264698 to take off CC500 AND CC875 and added XCC500 AND XCC875,,,
825,,1/4/2011,588779,,171102,JC,V3A,,,W.4,Changing from a 310AJ motor to a 310AX,MTF # 46746 to fan assembly and motor,,,
826,,1/4/2011,588948,,170941,JC,V3B,,,W.4,Changing from a 310AJ motor to a 310AX,MTF # 241092 and 241093 to change fan assemly and EBM motor,,,
827,,1/4/2011,588206,,171143,JC,H3A,,,WO.2,Potentiometer was missing from the work order,MTF # 264851 to add 29278,,,
828,,1/4/2011,584741 584742 584748 584747 584749,,171009,BF,V2B,,"Carlos, Laura",,Johnson units. Motors would not fit correctly using the motor mounts already installed.,MTF# S264510 to remove 006-300 motor mounts from work orders. MTF# S264699 to add 006-033 motor mounts to work orders.,,,
829,,1/4/2011,586519,,170891-1-2,DB,H3B,,"Carlos, Laura",WO.2,"1"" bushing not on BOM.",MTF# 264769 added 28614,,,
830,,1/4/2011,583814,,170804-1-3,DB,V3B,,"Carlos, Laura",WO.3,Wrong pulley (26710) and wrong Belt A-41 (29725) appear on WO.,MTF# 264570 removed those and put on an A-33 (26768) and pulley 27005. Two units so Qty 2 for each item.,,,
831,,1/5/2011,584742,,171009,JC,V2B,,,,there was an extra overload relay on the work order because it had been changed and the original was never taken off.,MTF # 241926 to take off 7- 27167 overload relay,,,
832,,1/5/2011,591742,,170965,JC,H3C,,"Carlos, Laura",WO.3,Belt was too short,MTF # 241729 to take off 30737 (BX42) and put on 28589 (BX52). Center to center distance was 19 3/8 in,,,
833,,1/5/2011,584749,,171009,JC,H2A,,Joe ,E.3,Did a motor change in order for the motor to work on the unit,MTF # 264854 to add 28918 and take off 28095 motor and SP01204 pulley,,,
834,,1/5/2011,588945,,171157,JC,V3B,,Alex,D,Stainless steel unit needed a stainless steel power entering cover plate.,Spoke with Alex and he designed X302-905 and MTF # 241094  was done to add to this work order.,,,
835,,1/5/2011,589259,,170966,JC,V3A,,Alex,D,Stainless steel unit needed a stainless steel power entering cover plate.,Spoke with Alex and he designed X302-905 and MTF # 241094  was done to add to this work order.,,,
836,,1/5/2011,584749,,171009,JC,H2A,,,,Changed overload relay because changed motor,MTF # 264857 to change overload relay. Took off 27169 and added 26736,,,
837,,1/6/2011,583815,,170804,JC,V3B,,"Carlos, Laura",WO.3,bore hole on the pulley was too big ,MTF # 241096  to take off 26710 7/8 pull and put on 27005 5/8 pulley,,,
838,,1/6/2011,583816,,170804,JC,V3B,,"Carlos, Laura",WO.3,bore hole on the pulley was too big ,MTF #  241096 to take off 26710 7/8 pull and put on 27005 5/8 pulley,,,
839,,1/6/2011,587632,,171143,BF,M2,,"Carlos, Laura",WO.2,H302-850 blank off #3 not on WO.,MTF# S242648 to add (1) H302-850,,,
840,,1/6/2011,583816,,170804,BF,M2,,"Carlos, Laura",WO.3,A41 Belt too large,"MTF# S241706 to remove A41 (29725) and add A33 (26780). C-C distance 12.5",,,
841,,1/7/2011,588945,,171157,JC,V3B,,Tom Read ,D,"Assembly drawing AD-V3B-162C-EPSSTLDR had a 7/8 distributor connecting to a 5/8 opening on a tee.

“，MTF＃264653添加衬套27256和28997 T恤，以便使用适合经销商的T恤。,,,

842,,1/7/2011,589257,,170966,JC,V3C,,Everyone ,WO.2,heat exchanger was missing from the work order ,MTF # 264858 to add the heat exchanger on work order and one was ordered.,,,

LOOK！ ^^^ S.O.的读者也做到了！

以下是以841开头的行的确切文本：

841 ,,, 1/7 / 2011,588945，，171157，JC，V3B ,, Tom Read，D，“装配图AD-V3B-162C-EPSSTLDR有一个7/8分配器连接到5/8开口在发球台上。 “，MTF＃264653添加衬套27256和28997 T恤，以便使用适合经销商的T恤。,,,

仅供参考：我正在使用C＃开发.NET Framework 4。

[已解决] 我能够使用Rob Parker的评论并使用原始Stream代替更漂亮的TextReader类来解决这个问题。事实证明，我的Rogue角色是一个插入的回车符（\n）。

using (Stream fs = File.Open(filename, FileMode.Open, FileAccess.Read)) {
  byte[] data = new byte[1024];
  int len;
  do {
    len = fs.Read(data, 0, data.Length);
    for (int n = 0; n < len; n++) {
     if ((n + 3) < len) {
        string strId = string.Format("{0}{1}{2}", (char)data[n + 1], (char)data[n + 2], (char)data[n + 3]);
        int numeric = Convert.ToInt32(strId);
        if (numeric == 841) {
          char[] suspects = new char[50];
          int n2 = n;
          int n3 = 0;
          while (n2 < len) {
            if ((n + 130 < n2) && (n2 < n + 160)) {
              suspects[n3++] = (char)data[n2];
            }
            n2++;
          }
          Console.WriteLine("Wait Here!");
          break;
        }
      }
    }
    num++;
  } while (0 < len);
}

感谢大家的帮助！

Answer 1

TextReader将以下任何字符视为行尾分隔符（它尝试与各种行尾惯例一起使用）：

CR。
旧的MacOS（OS X之前版）行尾惯例："\r"。
CR + LF。
Microsoft Windows / DOS行尾惯例："\r\n"。
LF。
* nix行尾惯例："\n"。

我怀疑你的某个地方有一个虚假的\r（CR）。

Answer 2

因为它特别有用......

你有没有检查一下句号和双引号字符在它分割线的位置之间有哪些字符？

如果ReadLine（）在其返回的内容中不包含换行符，则可能需要做一些工作才能找到它/它们。但是，如果您可以获取TextReader使用的FileStream对象（不确定它是否已暴露），您可以添加代码来检测问题行（从“841”开始）并点击断点（或Debugger.Break（））然后使用底层的FileStream用于备份Position并读取原始字节以查看其中的内容。

TextReader.ReadLine（）无法读取整行

2 个答案: