一种方法就是这样做

$result = Get-ChildItem "\\$server\$Path" -Filter "*.log" -File | 
          Select-String -Pattern $text -SimpleMatch |
          Select-Object -ExpandProperty Line |
          ForEach-Object {
              if ($_ -match '([a-z]{3,}\s*\d{2}\s*\d{2}:\d{2}:\d{2}\.\d{3}\s*\d{4}).*GUID ([\d.]+)') {
                  '{0},{1}' -f $matches[1], $matches[2]
              }
          }

$result | Out-File $logfile -Append

说明：

• 我将switch -SimpleMatch添加到Select-String cmdlet中，因为您似乎希望完全匹配$text，并且由于它在那里不使用regex，因此这将是最佳选择。
• Select-Object -ExpandProperty Line可以返回一个匹配行的数组，因此我将其通过管道传递给ForEach-Object，以循环通过该数组
• if (..)使用正则表达式-match，如果该条件为$true，则执行大括号内的任何操作。

此外，这个测试（如果$true）会自动设置一个$matches对象数组，我们使用这些匹配输出一个逗号分隔的行，然后将其收集到变量$result中。

• 最后，我们简单地将$result输出到一个文件中

Regex详细信息：

(               Match the regular expression below and capture its match into backreference number 1
   [a-z]        Match a single character in the range between “a” and “z”
      {3,}      Between 3 and unlimited times, as many times as possible, giving back as needed (greedy)
   \s           Match a single character that is a “whitespace character” (spaces, tabs, line breaks, etc.)
      *         Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   \d           Match a single digit 0..9
      {2}       Exactly 2 times
   \s           Match a single character that is a “whitespace character” (spaces, tabs, line breaks, etc.)
      *         Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   \d           Match a single digit 0..9
      {2}       Exactly 2 times
   :            Match the character “:” literally
   \d           Match a single digit 0..9
      {2}       Exactly 2 times
   :            Match the character “:” literally
   \d           Match a single digit 0..9
      {2}       Exactly 2 times
   \.           Match the character “.” literally
   \d           Match a single digit 0..9
      {3}       Exactly 3 times
   \s           Match a single character that is a “whitespace character” (spaces, tabs, line breaks, etc.)
      *         Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   \d           Match a single digit 0..9
      {4}       Exactly 4 times
)
.               Match any single character that is not a line break character
   *            Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
GUID\           Match the characters “GUID ” literally
(               Match the regular expression below and capture its match into backreference number 2
   [\d.]        Match a single character present in the list below
                A single digit 0..9
                The character “.”
      +         Between one and unlimited times, as many times as possible, giving back as needed (greedy)
)

使用Pattern属性过滤文件内容

$string=Select-String -Path .\batchvariables.bat -Pattern 'TEST_VERSION=(.*)'
$string.Matches.groups[1].value