如何使用 Powershell 在 foreach 循环中使用变量编写 if 语句？

Question

我现在在我的代码中运行下面的 foreach 循环，它运行良好。但是，如果满足条件，我更愿意让它在脚本末尾发送一封电子邮件，而不是针对发现的每个问题都发送一封电子邮件。我该怎么做？

foreach ($server in $servers) {
  $DT = Get-WmiObject -Class Win32_LocalTime -ComputerName $server
  $DateTime = (Get-Date -Day $DT.Day -Month $DT.Month -Year $DT.Year -Minute $DT.Minute -Hour $DT.Hour -Second $DT.Second)
  $SUTC = $DateTime.ToUniversalTime()
  $now = Get-Date
  $NUTC = $now.ToUniversalTime()
  $Difference = (New-TimeSpan -Start ($NUTC) -End  ($SUTC))
  Write-Host "Time at $server is $SUTC. Time difference of $Difference."
  if ($Difference -ge '00:03:00') {
    Send-MailMessage -Subject "Time Report -$(get-date -Format "MM-dd-yyy")" -Body "Time difference of more then 3 minutes detected." -SmtpServer "SMTPSERVER" -From "admin@firm.com" -To "group@firm.com" -UseSsl
  } 
}

Answer 1

在foreach 之前声明一个数组并添加消息。然后在 foreach 之后调用 Send-MailMessage。示例：

$errors =  @()   

foreach ($server in $servers) {
  $DT = Get-WmiObject -Class Win32_LocalTime -ComputerName $server
  $DateTime = (Get-Date -Day $DT.Day -Month $DT.Month -Year $DT.Year -Minute $DT.Minute -Hour $DT.Hour -Second $DT.Second)
  $SUTC = $DateTime.ToUniversalTime()
  $now = Get-Date
  $NUTC = $now.ToUniversalTime()
  $Difference = (New-TimeSpan -Start ($NUTC) -End  ($SUTC))
  Write-Host "Time at $server is $SUTC. Time difference of $Difference."
  if ($Difference -ge '00:03:00') {
    $errors += "Time difference of more then 3 minutes detected."
  } 
}

if($errors.Count -gt 0) {
    Send-MailMessage -Subject "Time Report -$(get-date -Format "MM-dd-yyy")" -Body ($errors -join "`n") -SmtpServer "SMTPSERVER" -From "admin@firm.com" -To "group@firm.com" -UseSsl
}

如何使用 Powershell 在 foreach 循环中使用变量编写 if 语句？

How can I write an if statement using a variable in a foreach loop using Powershell?

powershell

powershell-4.0