将CimInstance数组传递给CimMethod

Question

我正在通过Cim cmdlet使用WMI API.问题是我无法弄清楚如何将wmi对象传递给接受wmi对象数组的wmi方法.

这是方法参数定义:

Name                                            CimType Qualifiers
----                                            ------- ----------
Path                                             String {ID, in}
Permissions                               InstanceArray {EmbeddedInstance, ID, in}
ResetChildren                                   Boolean {ID, in}

Path并且ResetChildren是简单的参数.它们分别接受像"/path"和的简单值$true.但我有Permissions参数的麻烦.

这是我的代码

#Acquiring object that I want to pass to method
$group = Get-CimInstance -Namespace "root\VisualSVN" -ClassName VisualSVN_Group -Filter "Name='Readers'"

#Acquiring object which method will be called
$repositories = Get-CimInstance -Namespace "root\VisualSVN" -ClassName VisualSVN_Repository

#Preparing method arguments
$args = @{
    Path = "/";
    Permissions = @($group[0]); #Trouble here
    ResetChildren = $true
}

#Invoking method with arguments
Invoke-CimMethod -InputObject ($repositories[0]) -MethodName SetSecurity -Arguments $args

执行此代码将导致错误:

Invoke-CimMethod : Unable to cast object of type 'Microsoft.Management.Infrastructure.CimInstance' to type 'M
icrosoft.Management.Infrastructure.Native.InstanceHandle'.
Parameter name: value
At C:\somepath\script1.ps1:11 char:1
+ Invoke-CimMethod -InputObject ($repositories[0]) -MethodName SetSecurity -Argume ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Invoke-CimMethod], ArgumentException
    + FullyQualifiedErrorId : System.ArgumentException,Microsoft.Management.Infrastructure.CimCmdlets.Invoke
   CimMethodCommand

如果你改变代码

Permissions = @($group[0]); #Trouble here

要编码

Permissions = $group; #Trouble here

然后错误消息也会改变:

Invoke-CimMethod : Unable to cast object of type 'Microsoft.Management.Infrastructure.Native.InstanceHandle'
to type 'System.Collections.IList'.
Parameter name: value
At C:\somepath\script1.ps1:11 char:1
+ Invoke-CimMethod -InputObject ($repositories[0]) -MethodName SetSecurity -Argume ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Invoke-CimMethod], ArgumentException
    + FullyQualifiedErrorId : System.ArgumentException,Microsoft.Management.Infrastructure.CimCmdlets.Invoke
   CimMethodCommand

任何想法如何$group正确传递给方法？

Answer 1

我的方法有完全相同的问题VisualSVN_Repository::SetSecurity。

使用 CIM 方法参数时，必须将任何数组参数转换为[CimInstance[]].

例如，这对我有用：

$Everyone = Get-CimInstance -Namespace root/VisualSVN -ClassName VisualSVN_Everyone
# Grant Everyone a Read/Write access:
$AccessRule = New-CimInstance -Namespace root/VisualSVN -ClassName VisualSVN_PermissionEntry -ClientOnly -Property @{ Account = $Everyone; AccessLevel = [UInt32]2 }
$SvnRepo = Get-CimInstance -Namespace root/VisualSVN -ClassName VisualSVN_Repository -Filter "Name='MY_REPOSITORY_NAME'"

Invoke-CimMethod -InputObject $SvnRepo -MethodName SetSecurity -Arguments @{ 
    Path = '/';
    Permissions = [CimInstance[]]$AccessRule;
    ResetChildren = $true
} | Out-Null

[CimInstance[]]即使数组参数只是单个项目，也必须将其强制转换。

PS：也要小心Ref数组参数：您必须首先将其转换为[CimInstance[]]，然后再转换为[ref[]]。例如调用VisualSVN_Group::Create方法时：

[CimInstance[]] $SvnUsers = [CimInstance[]]($ArrayOf_VisualSVN_User_Objects)

Invoke-CimMethod -ClassName VisualSVN_Group -Namespace root/VisualSVN -MethodName Create -Arguments @{
    Members = [ref[]]$SvnUsers;
    Name = 'MY_NEW_GROUP_NAME'
} | Out-Null

另请参阅：提示#5：在 PowerShell 博客上传递引用和嵌入实例。