执行 Regex.Replace() 时如何使用命名组 [英] How to use named groups when performing a Regex.Replace()

问题描述

在执行 Regex.Replace 时如何使用命名捕获?我已经走了这么远，它做了我想要的但不是我想要的方式:

How do I use named captures when performing Regex.Replace? I have gotten this far and it does what I want but not in the way I want it:

[TestCase("First Second", "Second First")]
public void NumberedReplaceTest(string input, string expected)
{
    Regex regex = new Regex("(?<firstMatch>First) (?<secondMatch>Second)");
    Assert.IsTrue(regex.IsMatch(input));
    string replace = regex.Replace(input, "$2 $1");
    Assert.AreEqual(expected, replace);
}

我想用命名捕获匹配这两个词，然后在执行替换时使用(命名)捕获.

I want to match the two words with named captures and then use the (named) captures when performing the replace.

推荐答案

代替 "$2 $1"，你可以使用 "${secondMatch} ${firstMatch}">.

Instead of "$2 $1", you can use "${secondMatch} ${firstMatch}".

此处列出了您可以执行的所有替换操作.

There is a list of all the replacements you can do here.

这是一个简短的列表:

$number - 按编号捕获的组.

$number - The captured group by number.

${name} - 按名称捕获的组.

${name} - The captured group by name.

$$ - $ 文字.

$& - 整场比赛.

$` - 匹配前的输入字符串.

$` - The input string before the match.

$' - 匹配后的输入字符串.

$' - The input string after the match.

$+ - 捕获的最后一组.

$+ - The last group captured.

$_ - 整个输入字符串.

$_ - The entire input string.

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