entityMap|blocks|key|bee9t|text|您可以使用Get-Content和仅选择最后两行来读取文件内容，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|b5733|$fileContent+=+Get-Content+-Path+$file+-Tail+2|code-block|syntax|javascript|ajaq7|因此，将此代码添加到您的Get-Status函数应该会返回正确的状态：|bmsit|function+Get-Status($file)+{
++++$fileContent+=+Get-Content+-Path+$file+-Tail+2
++++if+(Select-String+-Quiet+-Pattern+'Finished+with+errors'+-InputObject+$fileContent)+{
++++++++return+"ERROR"
++++}+elseif+(Select-String+-Quiet+-Pattern+'Finished+with+warnings'+-InputObject+$fileContent)+{
++++++++return+"WARNING"
++++}+elseif+(Select-String+-Quiet+-Pattern+'Finished.'+-InputObject+$fileContent)+{
++++++++return+"SUCCESS"
++++}+else+{
+++++++return+"FAILED"
++++}
}|8rgj1^0|5|B|0|0|C|A|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|Q|9|@$A|R|B|S|C|D]]|E|@]|F|$]]|$2|G|4|H|6|I|8|T|9|@]|E|@]|F|$J|K]]|$2|L|4|M|6|7|8|U|9|@$A|V|B|W|C|D]]|E|@]|F|$]]|$2|N|4|O|6|I|8|X|9|@]|E|@]|F|$J|K]]|$2|P|4|-4|6|7|8|Y|9|@]|E|@]|F|$]]]]

you can read the files content using <code>Get-Content</code> and the select only the last two lines like:
<pre><code>$fileContent = Get-Content -Path $file -Tail 2
</code></pre>
so adding this to your <code>Get-Status</code> function should return the correct state:
<pre><code>function Get-Status($file) {
 $fileContent = Get-Content -Path $file -Tail 2
 if (Select-String -Quiet -Pattern 'Finished with errors' -InputObject $fileContent) {
 return &quot;ERROR&quot;
 } elseif (Select-String -Quiet -Pattern 'Finished with warnings' -InputObject $fileContent) {
 return &quot;WARNING&quot;
 } elseif (Select-String -Quiet -Pattern 'Finished.' -InputObject $fileContent) {
 return &quot;SUCCESS&quot;
 } else {
 return &quot;FAILED&quot;
 }
}
</code></pre>

entityMap|blocks|key|7r74k|text|在最新版本的PowerShell+Get-Content中支持-Tail参数，因此您可以将Get-Content转换为select字符串，例如，对于第一个if语句：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46ips|Get-Content+-Tail+2++$_.FullName+%7C+Select-String+-Quiet+'Finished.'|code-block|syntax|javascript|d8bsd^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|J|9|@]|A|@]|B|$F|G]]|$2|H|4|-4|6|7|8|K|9|@]|A|@]|B|$]]]]

In recent versions of PowerShell Get-Content supports -Tail parameter, so you can pipe Get-Content into select string, e.g. for first if statement:
<pre><code>Get-Content -Tail 2 $_.FullName | Select-String -Quiet 'Finished.'
</code></pre>

entityMap|blocks|key|ejv1f|text|另一种变体是在Get-Status函数中使用switch：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|evggv|function+Get-Status([string]$file)+{
++++#+get+the+last+two+lines+of+the+log+and+recombine+them+with+a+newline
++++switch+-Regex+((Get-Content+-Path+$file+-Tail+2)+-join+"`r`n")+{
++++++++'(?m)%5EFinished+with+error'+++{+'ERROR'+++;+break}
++++++++'(?m)%5EFinished+with+warning'+{+'WARNING'+;+break}
++++++++'(?m)%5EFinished'++++++++++++++{+'SUCCESS'+;+break}
++++++++default++++++++++++++++++++++{+'FAILED'}
++++}
}

Get-ChildItem+-Path+'C:\logfolder'+-Filter+'*.log'+-File+%7C+ForEach-Object+{
++++[PSCustomObject]+@{
++++++++Name+=+$_.Name
++++++++Date+=+$_.LastWriteTime
++++++++Status+=+Get-Status+$_.FullName
++++}
}|code-block|syntax|javascript|dacd1|请注意，对于PowerShell，您应该在函数名和参数之间使用空格字符，而不是将此参数放在括号中。|dj09v^0|7|A|M|6|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|O|9|@$A|P|B|Q|C|D]|$A|R|B|S|C|D]]|E|@]|F|$]]|$2|G|4|H|6|I|8|T|9|@]|E|@]|F|$J|K]]|$2|L|4|M|6|7|8|U|9|@]|E|@]|F|$]]|$2|N|4|-4|6|7|8|V|9|@]|E|@]|F|$]]]]

Another variation is to use a <code>switch</code> in the <code>Get-Status</code> function:
<pre><code>function Get-Status([string]$file) {
 # get the last two lines of the log and recombine them with a newline
 switch -Regex ((Get-Content -Path $file -Tail 2) -join &quot;`r`n&quot;) {
 '(?m)^Finished with error' { 'ERROR' ; break}
 '(?m)^Finished with warning' { 'WARNING' ; break}
 '(?m)^Finished' { 'SUCCESS' ; break}
 default { 'FAILED'}
 }
}

Get-ChildItem -Path 'C:\logfolder' -Filter '*.log' -File | ForEach-Object {
 [PSCustomObject] @{
 Name = $_.Name
 Date = $_.LastWriteTime
 Status = Get-Status $_.FullName
 }
}
</code></pre>
Please notice that with PowerShell you should use a space character betweet the function name and the parameter, not put this parameter inside brackets.

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://stackoverflow.com/questions/4426442/unix-tail-equivalent-command-in-windows-powershell|blocks|key|63k62|text|Unix+tail+equivalent+command+in+Windows+Powershell|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|e9i0s|在Get-Status()函数的最后，包含以下内容：|dn20a|$lines+=+Get-Content+$file+%7C+Select-Object+-Last+2|code-block|syntax|javascript|drv3p|而是针对$lines进行搜索。|60ng4^0|0|1E|0|0|0|0|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|U|G|@]|H|@$I|V|J|W|A|X]]|6|$]]|$A|K|C|L|2|E|F|Y|G|@]|H|@]|6|$]]|$A|M|C|N|2|O|F|Z|G|@]|H|@]|6|$P|Q]]|$A|R|C|S|2|E|F|10|G|@]|H|@]|6|$]]|$A|T|C|-4|2|E|F|11|G|@]|H|@]|6|$]]]]

<a href="https://stackoverflow.com/questions/4426442/unix-tail-equivalent-command-in-windows-powershell">Unix tail equivalent command in Windows Powershell</a>
At the stop of your Get-Status() function, include this:
<pre><code>$lines = Get-Content $file | Select-Object -Last 2
</code></pre>
The do your search against $lines instead.

How can I read only the last two rows of a .log file?
The following script reads the full .log file which returns an incorrect status.
For my particular case the string returning the correct status per .log file is written in the last two rows.
<pre><code>function Get-Status($file) {
 if (Select-String -Quiet 'Finished with errors' $_.FullName) {
 return &quot;ERROR&quot;
 } elseif (Select-String -Quiet 'Finished with warnings' $_.FullName) {
 return &quot;WARNING&quot;
 } elseif (Select-String -Quiet 'Finished.' $_.FullName) {
 return &quot;SUCCESS&quot;
 } else {
 return &quot;FAILED&quot;
 }
}

Get-ChildItem C:\logfolder\*.log | % {
 [PSCustomObject] @{
 Name = $_.Name;
 Date = $_.LastWriteTime;
 Status = Get-Status($_.FullName)]
 }
}
</code></pre>

PowerShell read last two rows of .log file

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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 如何只读取.log文件的最后两行？以下脚本读取返回错误状态的完整.log文件。对于我的特殊情况，返回每个.log文件的正确状态的字符串写在最后两行。 function Get-Status($file) {    if (Select-String -Quiet 'Finished with errors' $_.F...

问PowerShell读取.log文件的最后两行
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