TextReader.ReadLine（）无法读取整条生产线

Question

我已经得到了我想要在读书，我在1线一次读一个逗号分隔的文本文件。

，并处理这些信息。

使用下面的代码片段和文件片段，当我到达以841开头的行时，出现错误 - 它只能拉出147个字符。

问题：是什么原因导致TextReader停止拉线？它有一些特殊的顺序吗？

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行至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到添加衬套27256和28997三通为了使用一个适合进入分销商的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.的读者也是这么做的！

这是该行的确切文字与841开头：

841，1/7/2011,588945，171157，JC，V3B ,,汤姆读，d，“装配图AD-V3B-162C-EPSSTLDR有一个7/8分配器连接到三通的5/8开口， “，MTF＃264653到添加衬套27256和28997三通，以便使用适合分配器的三通。,,,

FYI：我在C＃开发针对.NET Framework 4的

[已解决]我能够使用Rob Parker的评论和使用原始Stream而不是更漂亮的TextReader类来解决这个问题。事实证明，我的流氓角色是插入的回车（\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

因为它原来是特别有帮助......

你检查什么字符（县）有在那里它分割线的点的周期和双引号字符之间？

如果ReadLine（）在返回的内容中不包含换行符，您可能需要做一些工作才能找到它/它们。但是如果你可以得到TextReader使用的FileStream对象（不知道它是否被暴露），你可以添加代码来检测问题行（从“841”开始），然后敲一个断点（或Debugger.Break（）），然后使用底层的FileStream来备份位置并读取原始字节以查看有哪些内容。

Answer 2

TextReader治疗以下任何字符作为结束线的定界符（它试图发挥好与最终的线的各种约定在那里）：

• CR。
  旧的MacOS（pre-OS X）行尾约定："\r"。
• CR + LF。
  Microsoft Windows/DOS行尾约定："\r\n"。
• LF。
  * nix行尾约定："\n"。

我的怀疑是你有一个伪造的\r（CR）在他们的某处浮动。