从文本文件中选择字符串的一部分，然后使用powershell将其写入另一个字符串

Question

i´m currently working on a script that reads out the standard printer on a workstation and write it to a textfile. Now i need to convert or cut the output string and write it to another file in order to set the cutted string as new default printer.

eg first textfile content is something like this:

\\NDPS-mydomain\\myprinter.ou.cn.mydomain.de

I'd like to get this:

PS-myprinter

The amount of characters of "myprinter" is different from printer to printer.

I'm stuck at cutting the parts I need out from the complete string.

Background:I´ve did a big printserver migration from novell to microsoft. In order to affect the users less than possible, i want to set the new microsoft deployed printer with this script as default printer again. Hope this is understandable.

Sorry for my bad english.

Thanks in advance

sample code so far:

$name = (get-content env:Computername)

Get-WmiObject -Class Win32_Printer -Filter "Default = $true" | 
    Select-Object - expandProperty Name | 
    Out-File  -filepath C:\"$name"_defaultprinter.txt

Get-Content "C:\"$name"_defaultprinter.txt" | 
    Foreach-Object {$_.Replace("NDPS","PS")} | 
    Set-Content "C:\"$name"_defaultprinter.txt"

Here is the output:

\\\\mydomain\\NDPS-MJP1-0014-SamsungML3471.A-Printers.MJP1.xx-xxxx.xxxxx-xxxxx.DE \\\\mydomain\\NDPS-MJP1-0014-SamsungML3471.A-Printers.MJP1.xx-xxxx.xxxxx-xxxxx.DE

Output should be only the PS-MJP1-0014-SamsungML3471

Answer 1

Try this script instead:

Get-WmiObject -Class Win32_Printer -Filter "Default = $true" | % {
    $_.Name -replace '(?:.*)\\NDPS-([^\.]+)(?:.*)', 'PS-$1'
} | Out-File  -FilePath "C:\$($env:COMPUTERNAME)_defaultprinter.txt"

EDIT : Try running this on one computer. Post all the output as an edit to YOUR question(not in a comment). If you need to hide some sensitive information, just replace the words(leave special characters etc.):

Get-WmiObject -Class Win32_Printer -Filter "Default = $true" | % {
    $_.Name

    $_.Name -replace '(?:.*)\\NDPS-(?:[^\\]+)\\(.+?)\.(?:.*)', 'PS-$1'
}

The regex I provided works perfect with one of your samplestrings, so it seems the actual value of $_.Name is not equal to the sample you provided. So run the code above and provide output as I said so we get a correct sample.