从Powershell调用带有数组参数的构造函数

Question

我是powershell的初学者,并且对C#适度了解.最近我写了这个powershell脚本,并想创建一个Hashset.所以我写了($ azAz是一个数组)

[System.Collections.Generic.HashSet[string]]$allset = New-Object System.Collections.Generic.HashSet[string]($azAZ)

并按下运行.我收到了这条消息:

New-Object : Cannot find an overload for "HashSet`1" and the argument count: "52".
At filename.ps1:10 char:55
+ [System.Collections.Generic.HashSet[string]]$allset = New-Object System.Collecti ...
+                                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [New-Object], MethodException
    + FullyQualifiedErrorId :         ConstructorInvokedThrowException,Microsoft.PowerShell.Commands.NewObjectCommand

然后,我使用数组参数在powershell中使用googled构造函数,并将代码更改为:

[System.Collections.Generic.HashSet[string]]$allset = New-Object System.Collections.Generic.HashSet[string](,$azAZ)

不知何故,我现在收到这条消息:

New-Object : Cannot find an overload for "HashSet`1" and the argument count: "1".
At C:\Users\youngvoid\Desktop\test5.ps1:10 char:55
+ [System.Collections.Generic.HashSet[string]]$allset = New-Object System.Collecti ...
+                                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [New-Object], MethodException
    + FullyQualifiedErrorId : ConstructorInvokedThrowException,Microsoft.PowerShell.Commands.NewObjectCommand

找不到HashSet的重载和参数count 1？你在跟我开玩笑吗？谢谢.

Answer 1

这应该工作:

[System.Collections.Generic.HashSet[string]]$allset = $azAZ

更新:

要在构造函数中使用数组,必须强类型化数组.这是一个例子:

[string[]]$a = 'one', 'two', 'three'
$b = 'one', 'two', 'three'

# This works
$hashA = New-Object System.Collections.Generic.HashSet[string] (,$a)
$hashA
# This also works
$hashB = New-Object System.Collections.Generic.HashSet[string] (,[string[]]$b)
$hashB
# This doesn't work
$hashB = New-Object System.Collections.Generic.HashSet[string] (,$b)
$hashB