Powershell -replace 当替换字符串包含 $+ [英] Powershell -replace when replacement string contains $+

问题描述

我正在 PowerShell 中进行字符串替换.我无法控制被替换的字符串，但我可以通过这种方式重现我遇到的问题:

I am doing a string replacement in PowerShell. I have no control over the strings that are being replaced, but I can reproduce the issue I'm having this way:

> 'word' -replace 'word','@#$+'
@#word

当我需要的实际输出是

> 'word' -replace 'word','@#$+'
@#$+

字符串 $+ 被扩展为被替换的单词，我无法找到阻止这种情况发生的方法.我试过用 \ 转义 $ (好像它是一个正则表达式)，用反引号 ` (这是正常的PowerShell方式).例如:

The string $+ is being expanded to the word being replaced, and there's no way that I can find to stop this from happening. I've tried escaping the $ with \ (as if it was a regex), with backtick ` (as is the normal PowerShell way). For example:

> 'word' -replace 'word',('@#$+' -replace '\$','`$')
@#`word

如何在 PowerShell 中用文字 $+ 替换?值得一提的是，我正在运行 PowerShell Core 6，但这也可以在 PowerShell 5 上重现.

How can I replace with a literal $+ in PowerShell? For what it's worth I'm running PowerShell Core 6, but this is reproducible on PowerShell 5 as well.

推荐答案

你可以像这样使用 .Replace() 方法，而不是使用 -replace 操作符:

Instead of using the -replace operator, you can use the .Replace() method like so:

PS> 'word'.Replace('word','@#$+')
@#$+

.Replace() 方法来自 .NET String 类，而 -Replace 运算符是使用 System.Text.RegularExpressions.Regex.Replace 实现的().

The .Replace() method comes from the .NET String class whereas the -Replace operator is implemented using System.Text.RegularExpressions.Regex.Replace().

此处的更多信息:https://vexx32.github.io/2019/03/20/PowerShell-Replace-Operator/

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