Регулярное выражение для соответствия пути в C#

Я новичок в регулярных выражений. Мне нужно извлечь путь из следующих строк:

XXXX       c:mypath1test
YYYYYYY             c:this is other pathlonger
ZZ        c:mypath3file.txt

Мне нужно реализовать метод, который возвращает путь к данной линии. Первый столбец-это слово с 1 или более символами, никогда не пустое, второй столбец-это путь. Разделителем может быть 1 или несколько пробелов, одна или несколько вкладок или оба.

6
.net-1.1 c# parsing regex string

3 ответов

мне кажется, что вы просто хотите

string[] bits = line.Split(new char[] { '\t', ' ' }, 2,
                           StringSplitOptions.RemoveEmptyEntries);
// TODO: Check that bits really has two entries
string path = bits[1];

(предполагается, что первый столбец никогда не содержит пробелов или вкладок.)

EDIT: как регулярное выражение вы, вероятно, можете просто сделать:

Regex regex = new Regex(@"^[^ \t]+[ \t]+(.*)$");

пример кода:

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main(string[] args)
    {
        string[] lines = 
        {
            @"XXXX       c:\mypath1\test",
            @"YYYYYYY             c:\this is other path\longer",
            @"ZZ        c:\mypath3\file.txt"
        };

        foreach (string line in lines)
        {
            Console.WriteLine(ExtractPathFromLine(line));
        }
    }

    static readonly Regex PathRegex = new Regex(@"^[^ \t]+[ \t]+(.*)$");

    static string ExtractPathFromLine(string line)
    {
        Match match = PathRegex.Match(line);
        if (!match.Success)
        {
            throw new ArgumentException("Invalid line");
        }
        return match.Groups[1].Value;
    }    
}
7
StringCollection resultList = new StringCollection();
try {
    Regex regexObj = new Regex(@"(([a-z]:|\\[a-z0-9_.$]+\[a-z0-9_.$]+)?(\?(?:[^\/:*?""<>|\r\n]+\)+)[^\/:*?""<>|\r\n]+)");
    Match matchResult = regexObj.Match(subjectString);
    while (matchResult.Success) {
        resultList.Add(matchResult.Groups[1].Value);
        matchResult = matchResult.NextMatch();
    } 
} catch (ArgumentException ex) {
    // Syntax error in the regular expression
}

поломки : 

@"
(                             # Match the regular expression below and capture its match into backreference number 1
   (                             # Match the regular expression below and capture its match into backreference number 2
      |                             # Match either the regular expression below (attempting the next alternative only if this one fails)
         [a-z]                         # Match a single character in the range between “a” and “z”
         :                             # Match the character “:” literally
      |                             # Or match regular expression number 2 below (the entire group fails if this one fails to match)
         \                            # Match the character “\” literally
         \                            # Match the character “\” literally
         [a-z0-9_.$]                   # Match a single character present in the list below
                                          # A character in the range between “a” and “z”
                                          # A character in the range between “0” and “9”
                                          # One of the characters “_.$”
            +                             # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
         \                            # Match the character “\” literally
         [a-z0-9_.$]                   # Match a single character present in the list below
                                          # A character in the range between “a” and “z”
                                          # A character in the range between “0” and “9”
                                          # One of the characters “_.$”
            +                             # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
   )?                            # Between zero and one times, as many times as possible, giving back as needed (greedy)
   (                             # Match the regular expression below and capture its match into backreference number 3
      \                            # Match the character “\” literally
         ?                             # Between zero and one times, as many times as possible, giving back as needed (greedy)
      (?:                           # Match the regular expression below
         [^\/:*?""<>|\r\n]             # Match a single character NOT present in the list below
                                          # A \ character
                                          # One of the characters “/:*?""<>|”
                                          # A carriage return character
                                          # A line feed character
            +                             # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
         \                            # Match the character “\” literally
      )+                            # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
   )
   [^\/:*?""<>|\r\n]             # Match a single character NOT present in the list below
                                    # A \ character
                                    # One of the characters “/:*?""<>|”
                                    # A carriage return character
                                    # A line feed character
      +                             # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
)
"
4

Тестер Регулярных Выражений это хороший веб-сайт, чтобы проверить регулярное выражение быстро.

Regex.Matches(input, "([a-zA-Z]*:[\[a-zA-Z0-9 .]*]*)");
0