blocks|key|175458|text|要获取目录的内容，您可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|175459|$files+=+Get-ChildItem+"C:\Users\gerhardl\Documents\My+Received+Files\"|code-block|syntax|javascript|175460|然后你也可以遍历这个变量：|175461|for+($i=0;+$i+-lt+$files.Count;+$i%2B%2B)+{
++++$outfile+=+$files[$i].FullName+%2B+"out"+
++++Get-Content+$files[$i].FullName+%7C+Where-Object+{+($_+-match+'step4'+-or+$_+-match+'step9')+}+%7C+Set-Content+$outfile
}|175462|一种更简单的方式是foreach循环(感谢@Soapy和@MarkSchultheiss)：|offset|length|style|CODE|175463|foreach+($f+in+$files){
++++$outfile+=+$f.FullName+%2B+"out"+
++++Get-Content+$f.FullName+%7C+Where-Object+{+($_+-match+'step4'+-or+$_+-match+'step9')+}+%7C+Set-Content+$outfile
}|175464|entityMap^0|0|0|0|0|9|7|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@$M|Z|N|10|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

To get the content of a directory you can use

<pre><code>$files = Get-ChildItem "C:\Users\gerhardl\Documents\My Received Files\"
</code></pre>

Then you can loop over this variable as well:

<pre><code>for ($i=0; $i -lt $files.Count; $i++) {
 $outfile = $files[$i].FullName + "out" 
 Get-Content $files[$i].FullName | Where-Object { ($_ -match 'step4' -or $_ -match 'step9') } | Set-Content $outfile
}
</code></pre>

An even easier way to put this is the <code>foreach</code> loop (thanks to @Soapy and @MarkSchultheiss):

<pre><code>foreach ($f in $files){
 $outfile = $f.FullName + "out" 
 Get-Content $f.FullName | Where-Object { ($_ -match 'step4' -or $_ -match 'step9') } | Set-Content $outfile
}
</code></pre>

blocks|key|176195|text|试一试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|176196|Get-ChildItem+"C:\Users\gerhardl\Documents\My+Received+Files"+-Filter+*.log+%7C+
Foreach-Object+{
++++$content+=+Get-Content+$_.FullName

++++#filter+and+save+content+to+the+original+file
++++$content+%7C+Where-Object+{$_+-match+'step[49]'}+%7C+Set-Content+$_.FullName

++++#filter+and+save+content+to+a+new+file+
++++$content+%7C+Where-Object+{$_+-match+'step[49]'}+%7C+Set-Content+($_.BaseName+%2B+'_out.log')
}|code-block|syntax|javascript|176197|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Give this a try:

<pre><code>Get-ChildItem "C:\Users\gerhardl\Documents\My Received Files" -Filter *.log | 
Foreach-Object {
 $content = Get-Content $_.FullName

 #filter and save content to the original file
 $content | Where-Object {$_ -match 'step[49]'} | Set-Content $_.FullName

 #filter and save content to a new file 
 $content | Where-Object {$_ -match 'step[49]'} | Set-Content ($_.BaseName + '_out.log')
}
</code></pre>

blocks|key|176199|text|其他的答案都很棒，我只想补充一下...PowerShell中可用的另一种方法是:安装GNUWin32实用程序并使用grep查看行/将输出重定向到文件http://gnuwin32.sourceforge.net/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|176200|这样每次都会覆盖新文件：|176201|grep+"step[49]"+logIn.log+>+logOut.log+|code-block|syntax|javascript|176202|这将附加日志输出，以防您覆盖logIn文件并希望保留数据：|176203|grep+"step[49]"+logIn.log+>>+logOut.log+|176204|注意:为了能够全局使用GNUWin32工具，您必须将bin文件夹添加到您的系统路径中。|176205|entityMap|0|LINK|mutability|MUTABLE|url|http://gnuwin32.sourceforge.net/^0|22|W|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|15|8|@]|9|@]|C|$I|J]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|C|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

Other answers are great, I just want to add... a different approach usable in PowerShell:
Install GNUWin32 utils and use grep to view the lines / redirect the output to file <a href="http://gnuwin32.sourceforge.net/" rel="nofollow">http://gnuwin32.sourceforge.net/</a>

This overwrites the new file every time:

<pre><code>grep "step[49]" logIn.log &gt; logOut.log 
</code></pre>

This appends the log output, in case you overwrite the logIn file and want to keep the data:

<pre><code>grep "step[49]" logIn.log &gt;&gt; logOut.log 
</code></pre>

Note: to be able to use GNUWin32 utils globally you have to add the bin folder to your system path.

blocks|key|177899|text|如果需要递归地在目录中循环查找特定类型的文件，请使用以下命令，该命令将过滤所有doc文件类型的文件|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|177900|$fileNames+=+Get-ChildItem+-Path+$scriptPath+-Recurse+-Include+*.doc|177901|如果您需要对多个类型进行过滤，请使用以下命令。|177902|$fileNames+=+Get-ChildItem+-Path+$scriptPath+-Recurse+-Include+*.doc,*.pdf|177903|现在，$fileNames变量充当数组，您可以从中循环和应用业务逻辑。|BOLD|177904|entityMap^0|13|3|0|0|1W|0|0|0|22|0|3|A|H|2|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|W|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|L|3|M|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|N]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|P|$]]

If you need to loop inside a directory recursively for a particular kind of file, use the below command, which filters all the files of <code>doc</code> file type 

<code>$fileNames = Get-ChildItem -Path $scriptPath -Recurse -Include *.doc</code>

If you need to do the filteration on multiple types, use the below command.

<code>$fileNames = Get-ChildItem -Path $scriptPath -Recurse -Include *.doc,*.pdf</code>

Now <code>$fileNames</code> variable act as an array from which you can loop and apply your business logic.

How can I change the following code to look at all the .log files in the directory and not just the one file?

I need to loop through all the files and delete all lines that do not contain "step4" or "step9". Currently this will create a new file, but I'm not sure how to use the <code>for each</code> loop here (newbie).

The actual files are named like this: 2013 09 03 00_01_29.log. I'd like the output files to either overwrite them, or to have the SAME name, appended with "out".

<pre><code>$In = "C:\Users\gerhardl\Documents\My Received Files\Test_In.log"
$Out = "C:\Users\gerhardl\Documents\My Received Files\Test_Out.log"
$Files = "C:\Users\gerhardl\Documents\My Received Files\"

Get-Content $In | Where-Object {$_ -match 'step4' -or $_ -match 'step9'} | `
Set-Content $Out
</code></pre>

Loop through files in a directory using PowerShell

如何更改以下代码以查看目录中的所有.log文件，而不仅仅是一个文件？我需要遍历所有文件并删除所有不包含"step4“或"step9”的行。目前，这将创建一个新文件，但我不确定如何在这里使用for each循环(新手)。实际文件的命名方式如下：2013 09 03 00_01_29.log。我希望输出文件要么覆盖它们，要...

问使用PowerShell遍历目录中的文件
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