使用Powershell腳本替換給定輸入中文本的第一次出現

Question

以下代碼有效，但會替換它找到的所有文本。有沒有辦法只取代第一次發生。我已經嘗試了4天的一切。

請幫忙。

cls 
$fileName = "c:\test\bmsbackuplog.htm" 
$findstring=Select-string $fileName -Pattern "The backup of volume system reserved" -list 
$replacement = "<tr><td>Change using this line</td></tr>"  
$firstdata=$findstring[0].Line 
$both="$firstdata$replacement" 
$match ="The backup of volume system reserved*.*" 
(Get-Content ($fileName)) -replace $match,$both | Set-Content "c:\test\bmsbackuplog.htm" 

Answer 1

我會用零寬度負回顧後發斷言爲：

$fileName = "c:\test\bmsbackuplog.htm" 
$pattern = 'The backup of volume system reserved' 
$replacement = '$1<tr><td>Change using this line</td></tr>' 
[io.file]::ReadAllText($fileName) -replace "(?<!$pattern[\s\S]*)($pattern)", $replacement