I am trying to remove all the lines from a text file that contains a partial string using the below PowerShell code:
Get-Content C:\new\temp_*.txt | Select-String -pattern "H|159" -notmatch | Out-File C:\new\newfile.txt
The actual string is H|159|28-05-2005|508|xxx
, it repeats in the file multiple times, and I am trying to match only the first part as specified above. Is that correct? Currently I am getting empty as output.
Am I missing something?
This question is related to
powershell
powershell-2.0
powershell-3.0
Escape the | character using a backtick
get-content c:\new\temp_*.txt | select-string -pattern 'H`|159' -notmatch | Out-File c:\new\newfile.txt
The pipe character |
has a special meaning in regular expressions. a|b
means "match either a
or b
". If you want to match a literal |
character, you need to escape it:
... | Select-String -Pattern 'H\|159' -NotMatch | ...
Suppose you want to write that in the same file, you can do as follows:
Set-Content -Path "C:\temp\Newtext.txt" -Value (get-content -Path "c:\Temp\Newtext.txt" | Select-String -Pattern 'H\|159' -NotMatch)
Source: Stackoverflow.com