ivor

$filename = "C:\Users\mac\Desktop\a.txt"
([regex]$pattern='(?=.*BENDE)(?=.*LASTF).*\r?\n?').replace([IO.File]::ReadAllText($filename),'',1) | set-content $filename
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ivor

回复 3# yhcfsr

Replace(String, String, Int32, Int32)	
In a specified input substring, replaces a specified maximum number of strings that match a regular expression pattern with a specified replacement string.
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重载了好几种用法，详情访问地址：https://docs.microsoft.com/en-us ... =netframework-4.7.2