C#替换匹配开始结束的表达式 [英] C# Replace expression matching start end

问题描述

任何人都可以帮我在 C# 中的字符串中替换以startingChars"开头并以endingChars"结尾的任何字符串......类似这样的:

Can anyone help me do a replace in a string in C# of any any string starting with "startingChars" and ending with "endingChars"...something like that:

Regex.Replace(strToReplaceIn, "startingChars[anyNumberOfChars]endingChars", myFunction(anyNumberofChars));

其中 strStartingChars 和 strEndingChars 是两个字符串并且定义了 myFunction

where strStartingChars and strEndingChars are two strings and myFunction is defined

例如，如果开头是 "Hello, I need to replace startingCharsWITH_SOMETHINGendingChars, ...." 结果为: "Hello, I need to replace myFunctionResult("WITH_SOMETHING"), ..."

for example, if a starting is "Hello, I need to replace startingCharsWITH_SOMETHINGendingChars, ...." the result to be: "Hello, I need to replace myFunctionResult("WITH_SOMETHING"), ..."

请让我知道有帮助的 Regex.Replace 表达式，问题不是找到匹配的表达式，而是替换...我该如何参考

Please, let me know the Regex.Replace expression that will help, the problem is not finding the matching expression, but the replacing...how can I refer to

anyNumberOfChars  

在表达式的替换参数中?

in the replacement parameter of the expression?

我希望它足够清楚...谢谢

I hope it's clear enough...Thank you

推荐答案

您可以使用命名组轻松获取要替换的内容，并使用匹配评估器来构造替换字符串:

You can use a named group to easily get the contents to replace, and a match evaluator to construct the replacement string:

using System.Text.RegularExpressions;

static class Program {
    static void Main(string[] args) {
        string strToReplaceIn = "Hello, I need to replace startingCharsWITH_SOMETHINGendingChars, ....";
        string replaced = Regex.Replace(strToReplaceIn, "startingChars(?<contents>.*?)endingChars", (match) => {
            return "myFunctionResult(" + match.Groups["contents"].Value + ")";
        });
    }
}

一个 命名组((?<contents>.*?) 表达式中的位) 可以让您引用表达式的子部分，我认为这就是您所要求的.
或者，您可以使用一个简单的 group ，即只是括号之间的表达式，而没有 ? 部分:(.*).然后，您应该使用整数索引来引用它:

A named group (the (?<contents>.*?) bit in the expression) is something that lets you refer to a subpart of the expression, which I think is what you are asking for.
Alternatively, you could use a simple group , i.e. just an expression between parenthesis, without the ?<name> part: (.*). Then, you should refer to it with an integer index:

match.Groups[1].Value

(注:Groups[0] 代表整场比赛)

(Note: Groups[0] represents the whole match)

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