Powershell：检查网络驱动器是否存在，如果没有，映射它，然后仔细检查

Question

我想写一个简单的脚本来检查网络驱动器是否可用，映射它，如果它不是，然后仔细检查映射工作（报告任何问题，如帐户映射意外过期等）。如果双重检查失败，它会发送一封电子邮件，否则它会报告一切正常。

我不能得到双重检查工作。我认为我的说法错了？

$Networkpath = "X:\Testfolder" 
$pathExists = Test-Path -Path $Networkpath 

If (-not ($pathExists)) { 
(new-object -com WScript.Network).MapNetworkDrive("X:","\\Server-01\Share") 
} 

ELSEIF (-not ($pathExists)) { 
Write-Host "Something went very wrong" 
#Insert email code here 
} 

ELSE {Write-Host "Drive Exists already"} 

Answer 1

我喜欢詹姆斯的回答，但想解释为什么你有这个问题。您的重复检查失败的原因是您实际上只检查一次Path。

在代码的开始，你检查，看看是否在这两条线

$Networkpath = "X:\Testfolder" 
$pathExists = Test-Path -Path $Networkpath 

变量$pathExists在这一点上并保存结果从那个时间点创建所在的路径。这就是为什么你仔细检查，如果在代码后面失败，它实际上是从第一次使用相同的输出。

代码继续测试路径是否存在，如果不存在，则创建路径。

If (-not ($pathExists)) { 
(new-object -com WScript.Network).MapNetworkDrive("X:","\\Server-01\Share") 
} 

你应该做的是在这里增加一个测试，然后你就会知道驱动器已经存在。

---

我添加了额外的测试，为您和调整了小幅通过脚本的流程，用Write-Host输出为每个分支。这是完整的代码。

$Networkpath = "X:\Testfolder" 
$pathExists = Test-Path -Path $Networkpath 

If (-not ($pathExists)) { 
(new-object -com WScript.Network).MapNetworkDrive("X:","\\Server-01\Share") 
} 
else { 
Write-host "Path already existed" 
Return  #end the function if path was already there 
} 

#Path wasn't there, so we created it, now testing that it worked 

$pathExists = Test-Path -Path $Networkpath 

If (-not ($pathExists)) { 
Write-Host "We tried to create the path but it still isn't there" 
#Insert email code here 
} 

ELSE {Write-Host "Path created successfully"} 

Answer 2

您可以使用if的if（嵌套if）中的驱动器已被映射后进行检查。

我也改变了第一次检查的逻辑，所以它不使用-not，因为它使代码更简单。

$Networkpath = "X:\Testfolder" 


If (Test-Path -Path $Networkpath) { 
    Write-Host "Drive Exists already" 
} 
Else { 
    #map network drive 
    (New-Object -ComObject WScript.Network).MapNetworkDrive("X:","\\Server-01\Share") 

    #check mapping again 
    If (Test-Path -Path $Networkpath) { 
     Write-Host "Drive has been mapped" 
    } 
    Else { 
     Write-Host "Something went very wrong" 
    } 
}