如何使用Regex在c#中提取文本字符串中方括号的内容 [英] How to extract the contents of square brackets in a string of text in c# using Regex

问题描述

如果我有如下所示的字符串，即使在换行符处经过了换行符，我该如何在c#中的集合中收集括号的内容?

if i have a string of text like below, how can i collect the contents of the brackets in a collection in c# even if it goes over line breaks?

例如...

string s = "test [4df] test [5yu] test [6nf]";

应该给我..

collection [0] = 4df

collection[0] = 4df

collection [1] = 5yu

collection[1] = 5yu

collection [2] = 6nf

collection[2] = 6nf

推荐答案

您可以使用正则表达式和一些Linq来做到这一点.

You can do this with regular expressions, and a bit of Linq.

    string s = "test [4df] test [5y" + Environment.NewLine + "u] test [6nf]";

    ICollection<string> matches =
        Regex.Matches(s.Replace(Environment.NewLine, ""), @"\[([^]]*)\]")
            .Cast<Match>()
            .Select(x => x.Groups[1].Value)
            .ToList();

    foreach (string match in matches)
        Console.WriteLine(match);

输出:

4df
5yu
6nf

正则表达式的含义如下:

Here's what the regular expression means:

\[   : Match a literal [
(    : Start a new group, match.Groups[1]
[^]] : Match any character except ]
*    : 0 or more of the above
)    : Close the group
\]   : Literal ]

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