Question

我需要一些逻辑/编程帮助来从文本文件中读取多个记录。我可以读取line for line，但是我需要在记录完成后立即停止，将该对象推送到列表，然后继续新记录，直到下一个记录出现，保存到列表等... < / p>

记录的标题始终以G作为第一个字符开头。其余如果是V（变量），D（坐标），M（插入点）等......

文件内容如下所示:(虚拟数据）

G FEATURE01 LEVEL01
M -10.5132 10.0000 697.5086
V \~\@ENTITY=LINE 
V \~\@PENSTYLE=0
V \~\@PENTHICK=1
D -10.5089 12.0797 697.8155
D -10.4971 13.6198 698.0429
D -10.0399 17.3069 698.5913
D -10.7665 11.6108 699.2279
D -10.6769 15.9840 699.8735
D -10.8229 13.6024 710.4438
G FEATURE02 LEVEL02
M -10.2681 10.0000 700.4186
V \~\@ENTITY=LINE
V \~\@PENSTYLE=0
V \~\@PENTHICK=1
D -10.2269 10.6946 700.4941
D -10.2585 13.1788 700.7637
D -10.2937 15.9480 701.0642
D -10.9494 20.5230 709.1840
D -10.9277 21.4909 709.4517
D -10.8335 23.3862 709.9763
G FEATURE01 LEVEL02
M -15.4500 10.0000 700.4174
V \~\@ENTITY=LINE 0.00 0 0.00 A A
V \~\@PENSTYLE=0 0.00 0 0.00 A A
V \~\@PENTHICK=1 0.00 0 0.00 A A
D -15.5690 12.3042 700.6673
D -15.3502 14.3130 700.8863
D -15.1219 16.7179 701.1480
D -15.0628 17.3409 701.2427
D -15.5481 20.8968 709.2855
D -15.3132 22.9163 709.8470
D -15.1355 23.2957 709.9627
G FEATURE03 LEVEL03
P 0.0000 0.0000 0.0000 270.0000 90.0000
M -12.8612 14.2951 737.6336
V \~\@ENTITY=LINE
V \~\@PENSTYLE=1
V \~\@PENTHICK=1
V @0ver1ay=KOOS
D -13.2715 15.5321 736.5965

因此，从上面可以看到文本文件中有4条记录。有任何想法吗？感谢

Answer 1

这是一段代码，为了清晰起见，我试图将它们放在一起，而不是强健等等。它应该让你走上正轨。

1-我创建了一个简单的记录类，它将为每条记录创建（以'G'开头的行），然后所有后续行都被添加到该记录中，直到在文件中遇到新的记录开始。

class Record
{
  public List<string> Lines { get; private set; }
  public Record()
  {
    Lines = new List<string>();
  }
}

2-然后，以下代码将逐行处理文件，创建新记录并将每条记录添加到Record集合中。

  // Collection to be populated with the record data in the file
  List<Record> records = new List<Record>();

  using (FileStream fs = new FileStream("datafile.dat", FileMode.Open))
  using (StreamReader rdr = new StreamReader(fs))
  {
    string line;

    // Read first line
    line = rdr.ReadLine();
    while (line != null)
    {   
      // Check if we have a new record
      if (line.StartsWith("G"))
      {
        // We have a start of a record so create an instance of the Record class
        Record record = new Record();

        // Add the first line to the record
        record.Lines.Add(line);

        // Read the next line
        line = rdr.ReadLine();

        // While the line is not the start of a new record or end of the file,
        // add the data to the current record instance
        while (line != null && !line.StartsWith("G"))
        {
          record.Lines.Add(line);
          line = rdr.ReadLine();
        }

        // Add the record instance to the record collection
        records.Add(record);
      }
      else
      {
        // If we get here there was something unexpected
        // So for now just move on and read the next line
        line = rdr.ReadLine();
      }
    } 
  }

从C＃中的Text文件中读取多个记录

1 个答案: