如何将有序哈希表传递给函数？
function doStuff {
Param (
[ordered]$theOrderedHashtable
)
$theOrderedHashtable
}
$datFileWithMinSizes = [ordered]@{"FileA.DAT" = "4"; "FileB.DAT" = "5"; "FileC.DAT" = "91" ; "FileD.DAT" = "847" }
doStuff -theOrderedHashtable $datFileWithMinSizes
以下不保持正确的顺序：
function doStuff {
Param (
[Hashtable]$theOrderedHashtable = [ordered]@{}
)
$theOrderedHashtable
}
$datFileWithMinSizes = [ordered]@{"FileA.DAT" = "4"; "FileB.DAT" = "5"; "FileC.DAT" = "91" ; "FileD.DAT" = "847" }
doStuff -theOrderedHashtable $datFileWithMinSizes
我目前能够使用它的唯一方法是不指定类型如下,但我想指定类型：
function doStuff {
Param (
$theOrderedHashtable
)
$theOrderedHashtable
}
$datFileWithMinSizes = [ordered]@{"FileA.DAT" = "4"; "FileB.DAT" = "5"; "FileC.DAT" = "91" ; "FileD.DAT" = "847" }
doStuff -theOrderedHashtable $datFileWithMinSizes
解决方法
使用完整类型名称：
function Do-Stuff {
param(
[System.Collections.Specialized.OrderedDictionary]$OrderedHashtable
)
$OrderedHashtable
}
要支持常规哈希表和有序词典,您必须使用单独的参数集：使用[System.Collections.IDictionary]接口,如suggested by briantist
function Do-Stuff {
[CmdletBinding(DefaultParameterSetName='Ordered')]
param(
[Parameter(Mandatory=$true,Position=0,ParameterSetName='Ordered')]
[System.Collections.Specialized.OrderedDictionary]$OrderedHashtable,[Parameter(Mandatory=$true,ParameterSetName='Hashtable')]
[hashtable]$Hashtable
)
if($PSCmdlet.ParameterSetName -eq 'Hashtable'){
$OrderedHashtable = $Hashtable
}
$OrderedHashtable
}
