在 Powershell 中将内容插入文本文件 [英] Insert Content into Text File in Powershell

问题描述

我想在 Powershell 中将内容添加到文本文件的中间.我正在搜索特定模式，然后在其后添加内容.请注意，这是在文件的中间.

I want to add content into the middle of a text file in Powershell. I'm searching for a specific pattern, then adding the content after it. Note this is in the middle of the file.

我目前拥有的是:

 (Get-Content ( $fileName )) | 
      Foreach-Object { 
           if($_ -match "pattern")
           {
                #Add Lines after the selected pattern
                $_ += "`nText To Add"
           }
      }
  } | Set-Content( $fileName )

然而，这行不通.我假设是因为 $_ 是不可变的，还是因为 += 运算符没有正确修改它?

However, this doesn't work. I'm assuming because $_ is immutable, or because the += operator doesn't modify it correctly?

将文本附加到 $_ 的方法是什么，这将反映在以下 Set-Content 调用中?

What's the way to append text to $_ that will be reflected in the following Set-Content call?

推荐答案

只输出额外的文本，例如

Just output the extra text e.g.

(Get-Content $fileName) | 
    Foreach-Object {
        $_ # send the current line to output
        if ($_ -match "pattern") 
        {
            #Add Lines after the selected pattern 
            "Text To Add"
        }
    } | Set-Content $fileName

您可能不需要额外的n"，因为 PowerShell 将为您行终止每个字符串.

You may not need the extra ``n` since PowerShell will line terminate each string for you.

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