Powershell脚本故障排除

Question

我正在处理一个脚本，该脚本将检查文件夹并返回上次修改文件日期的时间戳。 然后它将比较当前系统时间，并找出两者之间的时差；如果时间大于20分钟，则将发送电子邮件通知。

调试/运行它时，出现以下错误：

New-TimeSpan：找不到接受参数'$ null'的位置参数。 在C：\\ Users \\ jalden \\ Desktop \\ CalderaMonitoring-Part1.ps1：7 char：14 + $ dtdiff = New-TimeSpan（$ _。LastWriteTime）$（Get-Date）+ ~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + + CategoryInfo：InvalidArgument：（:) [New-TimeSpan]，ParameterBindingException + FullyQualifiedErrorId ：PositionalParameterNotFound，Microsoft.PowerShell.Commands.NewTimeSpanCommand

这是我的脚本：

$src="c:\test\"
$sendmail=$false

Get-Item -path $src | Foreach {$_.LastWriteTime}
Foreach-Object 
{ 
    #write-host $_.fullname
    $dtdiff = New-TimeSpan ($_.LastWriteTime) $(Get-Date)

    if ($dtdiff.minutes -gt 20)
    {
        $strbody=$strbody +$_.fullname+ " - Created Time: "  +$_.LastWriteTime +"`r`n"
        $sendmail=$true
    }       
}

#$strbody

if($sendmail -eq $true)
{
    # Email components
    $strFromAddress = "abc@xyz.net"
    $strToAddress = "abc@xyz.net"
    $strMessageSubject = "Files not uploaded in the last 20 minutes"
    $strMessageBody = $strbody
    $strSendingServer = "smtp.gmail.com"
    $SMTPPort = "587"
    $emailSmtpUser = "abc@xyz.net"
    $emailSmtpPass = "testasfasdfa"

    # Email objects
    $objSMTPMessage = New-Object System.Net.Mail.MailMessage         $strFromAddress, $strToAddress, $strMessageSubject, $strMessageBody
    $objSMTPClient = New-Object System.Net.Mail.SMTPClient( $strSendingServer, $SMTPPort )
    $objSMTPClient.EnableSsl = $true
    $objSMTPClient.Credentials = New-Object System.Net.NetworkCredential( $emailSmtpUser , $emailSmtpPass );
    $objSMTPClient.Send($objSMTPMessage)
}

有什么建议么？

Answer 1

在下面的第二行中，您没有向ForEach-Object提供任何输入，因此$_为$null

Get-Item -path $src | Foreach {$_.LastWriteTime}
  Foreach-Object { 
  #write-host $_.fullname
  $dtdiff = New-TimeSpan ($_.LastWriteTime) $(Get-Date)

  if ($dtdiff.minutes -gt 20){
    $strbody=$strbody +$_.fullname+ " - Created Time: "  +$_.LastWriteTime +"`r`n"
    $sendmail=$true
    }       
}

更改为：

Get-Item -path $src | ForEach-Object { 
  #write-host $_.fullname
  $dtdiff = New-TimeSpan ($_.LastWriteTime) $(Get-Date)

  if ($dtdiff.TotalMinutes -gt 20){
    $strbody=$strbody +$_.fullname+ " - Created Time: "  +$_.LastWriteTime +"`r`n"
    $sendmail=$true
    }       
}

作为@gravity注释 ，如果if语句，则应使用$dtdiff.TotalMinutes而不是$dtdiff.Minutes