Powershell - 使用哈希表合并来自两个变量的值答案

【问题标题】：Powershell - Merge values from two variables using hashtablePowershell - 使用哈希表合并来自两个变量的值
【发布时间】：2021-06-03 09:31:11
【问题描述】：

示例代码::-

$hash = $null
$hash = @{}

1..8 | ForEach-Object {
    if (Test-Connection -ComputerName "192.168.1.$_" -Count 1 -Quiet -ErrorAction "SilentlyContinue") {
        try{
                
            $proc = Get-WmiObject -Class Win32_operatingsystem -ComputerName "192.168.1.$_" -ErrorAction Stop |
            select CSName,caption

                    foreach ($p in $proc)
                        {
                            $hash.add($p.csname,$p.caption)
                        }
            }
        catch{
            write-warning "Unable to get WMI info from '192.168.1.$_'" |
            out-file "results.txt" -append
        }
    }
    else {
        write-warning "Unable to connect to '192.168.1.$_'" |
        out-file "results.txt" -append
    }
}

$hash

结果::

Name                           Value                                                                                                                                           
----                           -----                                                                                                                                           
DC                             Microsoft Windows Server 2016 Standard                                                                                                          
SCCMCB                         Microsoft Windows Server 2016 Standard                                                                                                          
WIN1020H2                      Microsoft Windows 10 Enterprise Evaluation

DESIRED Result 也应包含“IP”::

Name            IP                            Value                                                                                                                                           
----                                         -----                                                                                                                                           
DC              192.168.1.3               Microsoft Windows Server 2016 Standard                                                                                                          
SCCMCB          192.168.1.5               Microsoft Windows Server 2016 Standard                                                                                                          
WIN1020H2       192.168.1.7               Microsoft Windows 10 Enterprise Evaluation

【问题讨论】：

标签： powershell

【解决方案1】：

为什么是散列而不是 PsObject？
可以通过删除foreach($p in $proc) 来简化代码，并直接返回包含计算属性“IP”的对象

$result = 1..8 | ForEach-Object {
    $ip = "192.168.1.$_"
    if (Test-Connection -ComputerName $ip -Count 1 -Quiet -ErrorAction "SilentlyContinue") {
        try{
            # nowadays you should be using Get-CimInstance instead of Get-WmiObject
            # see https://blog.ipswitch.com/get-ciminstance-vs-get-wmiobject-whats-the-difference
            Get-WmiObject -Class  Win32_operatingsystem -ComputerName $ip -ErrorAction Stop |
            Select-Object CSName, @{Name = 'IP'; Expression = {$ip}}, Caption
        }
        catch{
            Write-Warning "Unable to get WMI info from '$ip'"
            "Unable to get WMI info from '$ip'" | Add-Content -Path "results.txt"
        }
    }
    else {
        Write-Warning "Unable to connect to '$ip'"
        "Unable to connect to '$ip'" | Add-Content -Path "results.txt"
    }
}

# output on screen
$result | Format-Table -AutoSize

# save as structured CSV file
$result | Export-Csv -Path 'D:\Test\ComputerInfo.csv' -NoTypeInformation

附：如果您还想更改属性名称CSName，您也可以使用计算属性，例如：

Select-Object @{Name = 'ComputerName'; Expression = {$_.CSName}}, @{Name = 'IP'; Expression = {$ip}}, Caption

【讨论】：

与 WMIObject 一起工作得很好。 & 如果我使用 CIMInstance，则会收到错误消息。 Get-CimInstance : WinRM 客户端无法处理请求。
@Varun 在这种情况下使用 Get-WmiObject -Class Win32_operatingsystem.. 将其改回为您使用旧的 WMI。