Replace the first occurence of a text in a given input using Powershell script -


the following code works, replaces occurrences of text finds. there way replace first occurrence. have tried 4 days now.

please help.

cls    $filename = "c:\test\bmsbackuplog.htm"   $findstring=select-string $filename -pattern "the backup of volume system reserved" -list  $replacement = "<tr><td>change using 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"

i use zero-width negative lookbehind assertion that:

$filename = "c:\test\bmsbackuplog.htm" $pattern = 'the backup of volume system reserved' $replacement = '$1<tr><td>change using line</td></tr>'  [io.file]::readalltext($filename) -replace "(?<!$pattern[\s\s]*)($pattern)", $replacement

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