get childitem有多少个参数集？

Question

看着get-help get-子项目，我会数到3

语法Get-ChildItem[[-路径]][[-过滤器]][-排除][强制][包括][名称][递归][UseTransation[]][
Get-ChildItem[[-过滤器]][-排除][强制][包括][名称][递归][]LiteralPath[-UseTransation[]][
Get-ChildItem[-属性][目录][文件][强制][隐藏][只读][系统][UseTransaction][]

但是，以下命令只找到2个（Items和literalitem）：

get-command get-childitem | select-object -expand ParameterSets | select-object Name

FWIW，show命令也只通过UI中的2个选项卡显示2个参数集。

我想问题是，为什么生成的get-childitem帮助似乎突破了最后一个用例。

Answer 1

只有两个参数集。

PS> gcm Get-ChildItem -syntax

Get-ChildItem [[-Path] <string[]>] [[-Filter] <string>] [-Include <string[]>] [-Exclude <string[]>] [-Recurse]
[-Force] [-Name] [-UseTransaction] [-Attributes <FlagsExpression[FileAttributes]>] [-Directory] [-File] [-Hidden]
[-ReadOnly] [-System] [<CommonParameters>]

Get-ChildItem [[-Filter] <string>] -LiteralPath <string[]> [-Include <string[]>] [-Exclude <string[]>] [-Recurse]
[-Force] [-Name] [-UseTransaction] [-Attributes <FlagsExpression[FileAttributes]>] [-Directory] [-File] [-Hidden]
[-ReadOnly] [-System] [<CommonParameters>]

我相信帮助中显示的第三组是向您显示文件系统提供程序的动态参数。这与我在Get ChildItem上执行帮助以查看证书提供程序的动态参数时所看到的内容相一致，例如：

PS> Get-Help Get-ChildItem -Full -Path cert:\

SYNTAX
    Get-ChildItem [[-Path] <String[]>] [[-Filter] <String>] [-Exclude <String[]>] [-Force] [-Include <String[]>]
    [-Name] [-Recurse] [-UseTransaction [<SwitchParameter>]] [<CommonParameters>]

    Get-ChildItem [[-Filter] <String>] [-Exclude <String[]>] [-Force] [-Include <String[]>] [-Name] [-Recurse]
    -LiteralPath <String[]> [-UseTransaction [<SwitchParameter>]] [<CommonParameters>]

    Get-ChildItem [-CodeSigningCert] [-DnsName <string>] [-EKU <string>] [-ExpiringInDays <int>]
    [-SSLServerAuthentication] [<CommonParameters>]