Question

我有一些文本文件，其中包含有关Windows Scheduler作业的执行，我正在尝试从这些文件中读取特定值并发送电子邮件，

例如：File_1.txt有以下几行，如果拒绝的计数大于0000000000，我们应该得到通知。

RECORDS READ:        0000000042
RECORDS SKIPPED:     0000000000
RECORDS PROCESSED:   0000000042
RECORDS REJECTED:    0000000001

我尝试使用Get-Content和Select-string cmdlet来获取字符串“ Records Rejected: 0000000001”，但不确定如何进行此操作。

$Output = Get-Content "C:\Powershell\Logs\*.log" |Select -Index 22
$output

$output = Select-String  -Path 'C:\Powershell\Logs\*.log'  -Pattern 'REJECTED:'

Answer 1

这对文件的内容做出了很多假设，因此如果不起作用，则可能需要用更多详细信息更新问题：

$filename = "c:\src\scratch\text\log.txt";

# read an array containing each line of text from the file
# (there's a performance issue if the file has very many lines)
$lines = Get-Content -Path $filename;

# split each line into an array of words
# (another performance issue if the file is very large)
$records = $lines | % { @(, $_.Split(" ", [StringSplitOptions]::RemoveEmptyEntries)) };

# find the line where the second word is "REJECTED:"
# (assumes there's only ever exactly one "REJECTED" line)
# (arrays are zero-based so the first index is [0], and the second index is [1])
$rejected = $records | where-object { $_[1] -eq "REJECTED:" };

# convert the third word from that line into a number
$count = [int] $rejected[2];

write-host "rejected count = $count";

如果您觉得很勇敢，可以将其全部压缩到一个管道中，但是我将其扩展了，因此更容易看到正在发生的事情。

当我用您的示例文件运行它时，得到以下输出：

rejected count = 1

Answer 2

这不是最漂亮的代码...实际上，它甚至都不是我不满意的代码...但是它可以工作，并且意图是它以您可以理解的方式工作！

旋转一下，看看你如何适应:-)

$file = "C:\temp\file.txt"

$content = Get-Content file

$rawRecordsRejected = $content | Where-Object {$_ -like "RECORDS REJECTED:*" }

Write-Host $rawRecordsRejected -ForegroundColor DarkYellow

$title = ($rawRecordsRejected -split ":")[0].Trim()
$recordsRejected = ($rawRecordsRejected -split ":")[1].Trim()

Write-Host $title -ForegroundColor Yellow
Write-Host $recordsRejected -ForegroundColor Green

Answer 3

当左侧的对象是集合时，使用PoSh处理-match的方式来获取拒绝计数。你得到的东西，不是布尔值。

# fake reading in a text file as raw text
#    in real life, use Get-Content
$InStuff = @'
RECORDS READ:        0000000042
RECORDS SKIPPED:     0000000000
RECORDS PROCESSED:   0000000042
RECORDS REJECTED:    0000000001
'@ -split [System.Environment]::NewLine

$TargetLine = 'rejected'
$MaxRejectsAllowed = 0

$RejectedCount = [int]($InStuff -match $TargetLine).Split(':')[-1].Trim()
if ($RejectedCount -gt $MaxRejectsAllowed)
    {
    Write-Warning ('The Rejected_Records count [ {0} ] is above the threshold of [ {1} ].' -f $RejectedCount, $MaxRejectsAllowed)
    }

输出...

WARNING: The Rejected_Records count [ 1 ] is above the threshold of [ 0 ].

使用Powershell从文本文件中检索字符串

3 个答案: