如何严格将变量键入为特定的WMI类？ [英] How do I strictly-type a variable as a specific WMI class?

问题描述

在大多数情况下，对功能参数的期望是 [wmiclass] 。但是，我正在使用带有自定义类的自定义名称空间。当我使用 Get-Member 时，它的显示类型为：

In most cases, what you're expecting for a function parameter is [wmiclass]. However, I'm working in a custom namespace with a custom class. When I use Get-Member, it shows the type as:

System.Management.ManagementClass#ROOT\namespace\class_name

如何将WMI类指定为变量类型？此示例不起作用：

How do I specify that WMI class as a variable type? This example doesn't work:

param(
    [wmiclass#root\namespace\class_name]
    $Class
)

此返回

Unable to find type [System.Management.ManagementClass#ROOT\namespace\class_name].

---

就这个问题而言，假设我我正在尝试定位

---

For the purpose of this question, let's say I'm trying to target

ROOT\cimv2\Win32_Service

---

标记 c＃，因为它与切向相关我很好奇这是否可以解决

---

tagging c# since it's tangentially related and I'm curious if this is solved there

推荐答案

您能做到吗？

Param (
    [PsTypeName("System.Management.ManagementClass#ROOT\namespace\class_name")]
    $Class
)

或者如果使用CIM代替WMI，则：

Or if using CIM instead of WMI, this:

Param (
    [PsTypeName("System.Management.Infrastructure.CimInstance#root/namespace/class_name")]
    $Class
)

测试案例：

function test {
    Param (
        [psTypename("System.Management.ManagementClass#ROOT\cimv2\StdRegProv")]
        $mine
    )
    $mine
}

$reg = [wmiclass]"\\.\root\cimv2:StdRegprov"
$reg | gm
#outputs:    TypeName: System.Management.ManagementClass#ROOT\cimv2\StdRegProv

[wmiclass]$wmi = ""
$wmi | gm
# outputs:    TypeName: System.Management.ManagementClass#\

test $wmi
# Errors:    test : Cannot bind argument to parameter 'mine', because PSTypeNames of the argument do not match the PSTypeName
# required by the parameter: System.Management.ManagementClass#ROOT\cimv2\StdRegProv.
# At line:1 char:6
# + test $wmi
# +      ~~~~
#     + CategoryInfo          : InvalidArgument: (:) [test], ParameterBindingArgumentTransformationException
#     + FullyQualifiedErrorId : MismatchedPSTypeName,test

test $reg
# outputs:    NameSpace: ROOT\cimv2
# Name                                Methods              Properties
# ----                                -------              ----------
# StdRegProv                          {CreateKey, Delet... {}

PowerShell V2测试：

function testv2 {    
    param(
        [ValidateScript({($_ | Get-Member)[0].typename -eq 'System.Management.ManagementClass#ROOT\cimv2\StdRegProv'})]
        $mine
    )
    $mine
}

testv2 $reg

# outputs:    NameSpace: ROOT\cimv2
#
# Name                                Methods              Properties
# ----                                -------              ----------
# StdRegProv                          {CreateKey, Delet... {}

testv2 $wmi

# Error:    testv2 : Cannot validate argument on parameter 'mine'. The "($_ | gm)[0].typename -eq 'System.Management.ManagementClas
# s#ROOT\cimv2\StdRegProv'" validation script for the argument with value "" did not return true. Determine why the valid
# ation script failed and then try the command again.
# At line:1 char:7
# + testv2 <<<<  $wmi
#     + CategoryInfo          : InvalidData: (:) [testv2], ParameterBindingValidationException
#     + FullyQualifiedErrorId : ParameterArgumentValidationError,testv2

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