PowerShell 对象检索所有对象属性

Question

我们遇到了一些奇怪的问题。我们创建的函数工作正常，并在第一个对象具有所需的所有属性时输出所有属性。如果不是这种情况，它只限于第一个对象的输出。

我知道这听起来有点令人困惑，但这就是我的意思：

Function Get-PrintersInstalledHC {
    Param (
        [Parameter(ValueFromPipeline)]
        [Object[]]$Servers
    )
    Process {
        foreach ($S in $Servers) {
            Try {
                if ($S.Enabled) {
                    $Printers = Get-Printer -ComputerName $S.Name -Full -EA Stop | 
                        Select-Object *, 
                            @{Name='ComputerStatus';Expression={'Ok'}}, 
                            @{Name='RetrievalDate';Expression={(Get-Date -Format "dd/MM/yyyy HH:mm")}}

                    if ($Printers) {
                        $CimParams = @{
                            ClassName    = 'Win32_PrinterConfiguration'
                            ComputerName = $S.Name
                            Property     = '*'
                            ErrorAction  = 'Stop'
                        }                
                        $Details = Get-CimInstance @CimParams

                        Foreach ($P in $Printers) {
                            Foreach($D in $Details) {
                                if ($P.Name -eq $D.Name) {
                                    $Props = @{
                                        DriverVersion = $D.DriverVersion
                                        Collate       = $D.Collate
                                        Color         = $D.Color
                                        Copies        = $D.Copies
                                        Duplex        = $D.Duplex
                                        PaperSize     = $D.PaperSize
                                        Orientation   = $D.Orientation
                                        PrintQuality  = $D.PrintQuality
                                    }
                                    $P | Add-Member -NotePropertyMembers $Props -TypeName NoteProperty -PassThru
                                    Break
                                }
                            }
                        }
                    }
                }
            }
            Catch {
                if (Test-Connection $S.Name -Count 2 -EA Ignore) {
                    [PSCustomObject]@{
                        ComputerName   = $S.Name
                        ComputerStatus = "ERROR: $($Error[0].Exception.Message)" 
                        RetrievalDate  = (Get-Date -Format "dd/MM/yyyy HH:mm")
                    }
                }
                else {
                    [PSCustomObject]@{
                        ComputerName   = $S.Name
                        ComputerStatus = 'Offline'
                        RetrievalDate  = (Get-Date -Format "dd/MM/yyyy HH:mm")
                    }
                }
            }
        }
    }
}

当第一个服务器在 Get-Printer 上失败而其他服务器成功时，它只输出 ComputerName、ComputerStatus 和 RetrievalDate。像这样：

$Servers = 'SERVER1', 'SERVER2' | Get-ADComputer | Select-Object Name, Enabled
Get-PrintersInstalledHC $Servers

ComputerName                             ComputerStatus                           RetrievalDate                          
------------                             --------------                           -------------                          
SERVER1                            ERROR: The spooler service is not rea... 01/07/2015 10:21                       
SERVER2                            Ok                                       01/07/2015 10:21                       
SERVER2                            Ok                                       01/07/2015 10:21                       
SERVER2                            Ok                                       01/07/2015 10:21                       
SERVER2                            Ok                                       01/07/2015 10:21

当第一个服务器成功 Get-Printer 而其他服务器不成功时，它会输出所有对象属性。

$Servers = 'SERVER2', 'SERVER1' | Get-ADComputer | Select-Object Name, Enabled
    Get-PrintersInstalledHC $Servers

RenderingMode         : SSR
PrinterStatus         : Normal
Type                  : Local
Caption               : 
Description           : 
ElementName           : 
InstanceID            : 
CommunicationStatus   : 
DetailedStatus        : 
HealthState           : 
InstallDate           : 
Name                  : PRINTERNAME
OperatingStatus       : 
OperationalStatus     : 
PrimaryStatus         : 
Status                : 
StatusDescriptions    : 
Comment               : 
ComputerName          : SERVER2
Datatype              : RAW
DefaultJobPriority    : 0
DriverName            : Canon
JobCount              : 0
KeepPrintedJobs       : False
Location              : Corridor
PermissionSDDL        : G:SYD:(A;;LCSWSDRCWDWO;;;WD)(A;CIIO;RC;;;CO)(A;OIIO;RPWPSDRCWDWO;;;CO)(A;;LCSWSDRCWDWO;;;S-1-5-21
                        -1078081533-261478967-839522115-331680)(A;OIIO;RPWPSDRCWDWO;;;S-1-5-21-1078081533-261478967-83952
                        2115-331680)(A;;LCSWSDRCWDWO;;;BA)(A;OIIO;RPWPSDRCWDWO;;;BA)
PortName              : PORTNAME
PrintProcessor        : winprint
Priority              : 1
Published             : False
SeparatorPageFile     : 
Shared                : True
ShareName             : SHARENAME
StartTime             : 0
UntilTime             : 0
PSComputerName        : 
CimClass              : ROOT/StandardCimv2:MSFT_Printer
CimInstanceProperties : {Caption, Description, ElementName, InstanceID...}
CimSystemProperties   : Microsoft.Management.Infrastructure.CimSystemProperties
ComputerStatus        : Ok
RetrievalDate         : 01/07/2015 10:24
PaperSize             : A4 210 x 297 mm
Orientation           : 1
Collate               : True
Color                 : 2
Copies                : 1
DriverVersion         : 1606
Duplex                : False
PrintQuality          : 600

# More objects here

ComputerName   : SERVER1
ComputerStatus : ERROR: The spooler service is not reachable.  Ensure the spooler service is running.
RetrievalDate  : 01/07/2015 10:25

如何确保始终生成所有属性？因为很难预测第一台服务器是否会在 Get-Printer.

出现故障

Answer 1

答案是将打印机的详细信息作为您正在创建的对象的单独属性。您的基本对象应如下所示：

ComputerName
ComputerStatus
RetrievalDate
PrinterDetails

您已经拥有前三个属性，而您目前正在做的是使该对象包含每台打印机的大量其他属性（如果计算机可访问）。

您需要做的是将大量属性放入其自己的对象并将其附加到第四个属性。然后你可以遍历输出并做一些事情 if PrinterDetails is not null.

我不完全明白你的 ForEach 循环中发生了什么 $P 和 $D 看起来你正在丰富 returns 来自的信息Get-Printer。只要保留了 $P | Add-Member，您就应该能够将 $Printers 分配给新的 PrinterDetails 属性（尽管我个人可能不会进行丰富，但是为详细信息本身创建一个属性。

Function Get-PrintersInstalledHC {
    Param (
        [Parameter(ValueFromPipeline)]
        [Object[]]$Servers
    )
    Process {
        foreach ($S in $Servers) {
            Try {
                if ($S.Enabled) {
                    $Printers = Get-Printer -ComputerName $S.Name -Full -EA Stop 

                    if ($Printers) {
                        $CimParams = @{
                            ClassName    = 'Win32_PrinterConfiguration'
                            ComputerName = $S.Name
                            Property     = '*'
                            ErrorAction  = 'Stop'
                        }                
                        $Details = Get-CimInstance @CimParams

                        Foreach ($P in $Printers) {
                            Foreach($D in $Details) {
                                if ($P.Name -eq $D.Name) {
                                    $Props = @{
                                        DriverVersion = $D.DriverVersion
                                        Collate       = $D.Collate
                                        Color         = $D.Color
                                        Copies        = $D.Copies
                                        Duplex        = $D.Duplex
                                        PaperSize     = $D.PaperSize
                                        Orientation   = $D.Orientation
                                        PrintQuality  = $D.PrintQuality
                                    }
                                    $P | Add-Member -NotePropertyMembers $Props -TypeName NoteProperty
                                    Break
                                }
                            }
                        }
                        [PSCustomObject]@{
                                ComputerName   = $S.Name
                                ComputerStatus = "Ok" 
                                RetrievalDate  = (Get-Date -Format "dd/MM/yyyy HH:mm")
                                PrinterDetails = $Printers
                       }
                    }
                }
            }
            Catch {
                if (Test-Connection $S.Name -Count 2 -EA Ignore) {
                    [PSCustomObject]@{
                        ComputerName   = $S.Name
                        ComputerStatus = "ERROR: $($Error[0].Exception.Message)" 
                        RetrievalDate  = (Get-Date -Format "dd/MM/yyyy HH:mm")
                        PrinterDetails = $null
                    }
                }
                else {
                    [PSCustomObject]@{
                        ComputerName   = $S.Name
                        ComputerStatus = 'Offline'
                        RetrievalDate  = (Get-Date -Format "dd/MM/yyyy HH:mm")
                        PrinterDetails = $null
                    }
                }
            }
        }
    }
}


$Servers = 'SERVER1', 'SERVER2' | Get-ADComputer | Select-Object Name, Enabled

Get-PrintersInstalledHC $Servers

这可能意味着您可能需要在检索到详细信息后进行一些额外的分析，但它为您提供了一个更可预测的对象。 PrinterDetails 属性现在应该是一个自定义对象数组，因此您可以 ForEach 覆盖它（如果它不是 $null）并拉回您想要的位。

PowerShell 对象检索所有对象属性

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