Question

我想在PowerShell中定义类。在该类中，我想使用其他地方定义的函数，因此当需要该值时，它会在需要时自动运行。以下是一个例子。

class ActiveDirectoryUser {
    $DisplayName
    $LastName
    $FirstName
    $FirstNameNonLatin =  Remove-StringLatinCharacters -String $FirstName 
}

然而，这并没有真正起作用。它在C＃中工作，那么在PowerShell中它的等价物是什么？

我正在以某种方式使用此代码：

 $user = New-Object ActiveDirectoryUser   
 $user.DisplayName = $u.DisplayName
 $user.LastName = $u.LastName
 $user.FirstName = $u.FirstName

 $user | ft *  # should show all fields including FirstNameNonLatin

Answer 1

给它一个旋转

function Get-FormattedFullName {
    Param (
        [string]
        $FirstName
        ,
        [string]
        $LastName
    )

    Process {
        return "{0} {1}" -f $FirstName, $LastName
    }

}

$ActiveDirectoryUser = New-Object -TypeName PSObject
$ActiveDirectoryUser | Add-Member -MemberType NoteProperty   -Name "FirstName" -Value "John"
$ActiveDirectoryUser | Add-Member -MemberType NoteProperty   -Name "LastName"  -Value "Smith"
$ActiveDirectoryUser | Add-Member -MemberType ScriptProperty -Name "FullName"  -Value `
    { #Get
        return Get-FormattedFullName -FirstName $this.FirstName -LastName $this.LastName
    }
`

$ActiveDirectoryUser

结果：

FirstName LastName FullName    
--------- -------- --------    
John      Smith    John Smith

如果我们然后更新对象的LastName属性，FullName也会反映此更改：

$ActiveDirectoryUser.LastName = "CHANGED"

$ActiveDirectoryUser

结果：

FirstName LastName FullName    
--------- -------- --------    
John      CHANGED  John CHANGED

Answer 2

您需要一个构造函数来使用另一个属性设置默认值。例如：

function Remove-StringLatinCharacters ([string]$String) { $string.Substring(0,1) }

class ActiveDirectoryUser {
    [string]$DisplayName
    [string]$LastName
    [string]$FirstName
    [string]$FirstNameNonLatin

    ActiveDirectoryUser ([string]$DisplayName, [string]$LastName, [string]$FirstName) {
        $this.DisplayName = $DisplayName
        $this.LastName = $LastName
        $this.FirstName = $FirstName
        $this.FirstNameNonLatin =  (Remove-StringLatinCharacters -String $FirstName)
    }
}

[ActiveDirectoryUser]::new("Disp","Last","First")

DisplayName LastName FirstName FirstNameNonLatin
----------- -------- --------- -----------------
Disp        Last     First     F

PowerShell类

2 个答案: