如何在powershell中使用重试和循环处理网络映射？

Question

我想绘制一个网络。如果映射失败，我需要使用retry。在最大限度地重试之后，它将失败并继续到另一个进程。如果映射通过，那么也继续到另一个进程。我试过这样做，但似乎重试不起作用。一旦映射失败，它不执行网络映射过程，只处理循环。任何人都可以给我主意。

$Stoploop = $false
[int]$Retrycount = "0"
do {
     try {
          
          $net = New-Object -ComObject WScript.Network                   
          $net.MapNetworkDrive("$Path", "\\$IP\$Folder", $False, "$Server\$user", "$pass")
          $Message = "NetWork Mapping : " + $Path + " Mount Successful"
          Write-Host $Message
          $Stoploop = $true
          CaptureLog "$Message`n "
     }
     catch {
          if ($Retrycount -eq 15){
          $Message_1 = "Could not mount after 15 retries." + " $_"
          $Stoploop = $true
          CaptureLog $Message_1
          ErrorHandling $Message_1
          }
          else {

               $Message = "NetWork Mapping : " + $Path + " Trying to mount..."
               Write-Host $Message
               CaptureLog $Message
               Start-Sleep -Seconds 3
               $Retrycount = $Retrycount + 1
          }
     }

}
while ($Stoploop -eq $false) {
}

非常感谢你的建议。感谢你！

Answer 1

这两个注释都是有效和有用的(在循环之外的com对象和、使用)。

现在，我测试了您的脚本，它应该可以实现您的期望。只有当网络驱动器已经在使用时，它才会忽略这一点。要用最少的修改来捕获它，您可以简单地在循环开始之前添加此检查：

if(Test-Path $Path) {
    # if you want to unmap the drive, use: $net.RemoveNetworkDrive($Path, $true) and remove the $Stoploop = $true
    $Message = "NetWork Drive " + $Path + " Already in use..."
    Write-Host $Message
    CaptureLog "$Message`n "
    $Stoploop = $true
}

现在，如果您想简化您的脚本，您可以这样做：

$net = New-Object -ComObject WScript.Network
$retrycount = 0

if(Test-Path $Path) {
    # if you want to unmap the drive, use: $net.RemoveNetworkDrive($Path, $true) and remove the $retrycount = 20
    $Message = "NetWork Drive " + $Path + " Already in use..."
    Write-Host $Message
    CaptureLog "$Message`n "
    $retrycount = 20
}
    
while($retrycount -lt 15) {
    $retrycount += 1
    try {
        $net.MapNetworkDrive($Path, "\\$IP\$Folder", $False, "$Server\$user", $pass)
        $Message = "NetWork Mapping (try $($retrycount)) - $($Path) Mount Successful"
        Write-Host $Message
        CaptureLog "$Message`n "
        $retrycount = 100 # this will exit the loop and indicate successful mapping
    } catch {
        $Message = "NetWork Mapping (try $($retrycount)) - $($Path) Mount failed: $($_.Exception.Message.Replace("`n",''))"
        Write-Host $Message
        CaptureLog "$Message`n "
        Start-Sleep -Seconds 3
    }
}