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powershell - 为什么 -replace 不能像这个 powershell 脚本中描述的那样工作？

问题描述

allacts.txt 中的输入文本是：

institutionId: blah blah,name: 1st thing,laestabNo: blah blah   institutionId: blah blah,name: 2nd thing,laestabNo: blah blah, [lots more things]   institutionId: blah blah,name: last thing,laestabNo: blah blah

所需的输出是：

1st thing,laestabNo: blah blah  2nd thing,laestabNo: blah blah, [lots more things]  last thing,laestabNo: blah blah

我在 powershell 脚本中使用的命令：

Powershell -NoProfile "(Get-Content -Raw .\allacts.txt) -replace 'institutionid.*,name', '' | Out-File -FilePath allacts.txt -Force -Encoding ASCII"

我实际得到的是：

last thing,laestabNo:blah blah

没有别的了。我究竟做错了什么？

标签： powershell

解决方案

您的正则表达式不适合您的用例。你是这个意思...

$SomeString = 'institutionId: blah blah,name: 1st thing,laestabNo: blah blah   institutionId: blah blah,name: 2nd thing,laestabNo: blah blah, [lots more things]   institutionId: blah blah,name: last thing,laestabNo: blah blah'
Clear-Host
# RegEx to replace all text string patterns and the text between them
$SomeString -Replace '(institutionId: ).*?(name: )'
# Results
<#
1st thing,laestabNo: blah blah   2nd thing,laestabNo: blah blah, [lots more things]   last thing,laestabNo: blah blah
#>

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