select 行开头和结尾

Question

我有一个带有 XAML 代码的 Powershell 脚本（用于显示一些 windows 和按钮）我尝试在文本文件中替换所有以 $computer.selectedvalue 开头和芬兰语为“,1”的行的值。

我的文本文件内容：

COMPUTER01,SITE01,PRINTER01,1
COMPUTER05,SITE02,PRINTER01,0
COMPUTER01,SITE03,PRINTER08,1

end with ,1默认是打印机，,0是辅助打印机

Powershell 代码：

$PLPrinterArray = Get-Printer  -ComputerName srvprint | select name
foreach ($PLPrinterArray in $PLPrinterArray) { 
  [void]$WPFCboPL.items.add(",PL,$($PLPrinterArray.Name)")
} 

$LDAPComputerArray = Get-ADComputer -filter * -SearchBase"OU=Ordinateurs,DC=MyDC,DC=Mydomain,DC=org" -Properties name
foreach ($LDAPComputerArray in $LDAPComputerArray) { 
  [void]$WPFCboComputer.items.add($($LDAPComputerArray.Name))
}

$WPFBoutonDefaut.Add_Click({
  #If (Get-Content C:\Users\User\desktop\test.txt
  $($WPFCboComputer.selectedvalue)^ ",1$") {
  #-replace ",1",",0"}
  Add-Content -path "C:\Users\User\Desktop\test.txt"
  -value"`n$($WPFCboComputer.selectedvalue)$($WPFCboPL.SelectedValue)$($WPFCboLN.SelectedValue),1"
})

是否可以这样做，尤其是在 Button.Add.Click 中？

提前致谢;-)

Answer 1

我建议使用带有 -Regex 和 -File 选项的 switch 语句：

$WPFBoutonDefaut.Add_Click({

  $file = 'C:\Users\User\desktop\test.txt'

  # Process the input file line by line with regex matching,
  # and collect the potentially modified lines in an array.
  [array] $modifiedlines = 
    switch -Regex -File $file {
      "^($($WPFCboComputer.SelectedValue),.+,)1$" { $Matches[1] + '0' }
      default { $_ } # pass through
    }

  # Save the modified lines plus the new line back to the file.
  # Note: Use -Encoding as needed.
  Set-Content $file -Value (
    $modifiedLines + "$($WPFCboComputer.SelectedValue)$($WPFCboPL.SelectedValue)$($WPFCboLN.SelectedValue),1"
  )

})

select 行开头和结尾

select lines begin with and finish with

powershell

select

line

word