.net - Powershell io.streamreader "-context" equivalent command -


i using below code in powershell collect relevant data large txt file.

$sr = new-object system.io.streamreader(get-item c:\test.txt)  while (($line = $sr.readline()) -ne $null) {     if ($line -match "data") { $line }  }  $sr.dispose()

this works useful if there equivalent powershell's select-string -context 1,0 able line above matched line.

can assist?

if need 1 previous line, following suffice: 

$sr = new-object system.io.streamreader(get-item c:\test.txt)  while (($line = $sr.readline()) -ne $null) {     if ($line -match "data") { $prev_line, $line }     $prev_line = $line }  $sr.dispose()

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