提取字符串 Powershell答案

【问题标题】：Extracting String Powershell提取字符串 Powershell
【发布时间】：2016-09-09 09:06:45
【问题描述】：

我正在尝试从 powershell 中的以下文本中提取贷款密钥：

Test\errorlog.txt:4::293:StepName:WARNING StepTime:9/9/2016 9:01:06 AM StepMessage:ERROR(KEY1:7798850,LOANKEY:11111)::POST PAYMENT StepNotes:[[WARNING]]
Test\errorlog.txt:8::299:StepName:WARNING StepTime:9/9/2016 9:01:11 AM StepMessage:ERROR(KEY1:7798870,LOANKEY:54321)::POST PAYMENT StepNotes:[[WARNING]]
Test\errorlog.txt:12::305:StepName:WARNING StepTime:9/9/2016 9:01:14 AM StepMessage:ERROR(KEY1:7798863,LOANKEY:12345)::POST PAYMENT StepNotes:[[WARNING]]

我目前有以下内容可以将错误日志过滤到您在上面看到的内容：

cls

$path = 'C:\Test\errorlog.txt'

$script = select-string -pattern "LOANKEY:" $path

【问题讨论】：

标签： powershell powershell-ise

【解决方案1】：

提到输入后，您可以使用正则表达式：

$txt = "Test\errorlog.txt:4::293:StepName:WARNING StepTime:9/9/2016 9:01:06 AM StepMessage:ERROR(KEY1:7798850,LOANKEY:11111)::POST PAYMENT StepNotes:[[WARNING]]",
"Test\errorlog.txt:8::299:StepName:WARNING StepTime:9/9/2016 9:01:11 AM StepMessage:ERROR(KEY1:7798870,LOANKEY:54321)::POST PAYMENT StepNotes:[[WARNING]]",
"Test\errorlog.txt:12::305:StepName:WARNING StepTime:9/9/2016 9:01:14 AM StepMessage:ERROR(KEY1:7798863,LOANKEY:12345)::POST PAYMENT StepNotes:[[WARNING]]"

$txt | % { [Regex]::Match($_, "(?<=LOANKEY:)(\d+)").Value }

【讨论】：

【解决方案2】：

select-string -pattern "LOANKEY:(.*)\)" .\errorlog.txt | % {"$($_.matches.groups[1])"}

那么你会得到你想要的。参考这里：How to get the captured groups from Select-String?

【讨论】：

@paweł-dyl 的回答也很棒，只需使用“更多”我们就可以保存变量定义：more .\errorlog.txt | % { [Regex]::Match($_, "(?<=LOANKEY:)(\d+)").Value }