Compare-Object $str $str1 | foreach InputObject | ft -auto | out-file "$resault" -width 5000
，我得到的財產以後，看起來像這樣
\\Server\path\path\Config.Current.Running.rt-1.ci.cou.txt
，我想它只是某些部分= rt-1.ci .cou在我的$relault .txt文件中
#Set a variable, Path, with the full string you're looking at
[string]$Path = '\\Server\path\path\Config.Current.Running.rt-1.ci.cou.txt'
#Remove the directory so we're left with just the filename
[string]$Filename = (Split-Path -Path $Path -Leaf)
#$FileName: Config.Current.Running.rt-1.ci.cou.txt
#use regular expressions to capture the text that appears after the 3rd period (`.`) and before the last period.
$Filename -replace '^[^.]*\.[^.]*\.[^.]*\.(.*)\.[^.]*$', '$1'
#Output: rt-1.ci.cou
你如何決定你想要的部分？即什麼是規則？例如\\ Server \ path \ path \ Config.Current.Running.'部分是否一致，或者可以改變/是否至少有一些一致的結構？ – JohnLBevan
是你的問題的第一部分，你提供'compare-object'等代碼，或者只是問題：'給定一個字符串，例如\\ Server \ path \ path \ Config.Current.Running .rt-1.ci.cou.txt'我怎麼把它減少到'rt-1.ci.cou'？） – JohnLBevan