powershell - Foreach 打印出整个数组

Question

早上好。

我可以就我在这里可能做错的事情获得一些帮助吗？无论出于何种原因，返回输出正在打印整个数组而不是遍历它。该函数假设允许用户在命令行语法中输入，如果没有提供任何内容，它会选择可供选择的内容。

好的，到目前为止，选择选择以及为函数提供参数的工作，关于它获取正确的数组。它没有做的是遍历数组。

见下文：

$Group1 = @("1st Group", "2nd Group")
$Group2 = @("3rd Group", "4th Group")

$Resultss = {
    New-Object System.Management.Automation.CompletionResult 'Group1', 'Group1', 'ParameterValue', 'this is Group 1'
    New-Object System.Management.Automation.CompletionResult 'Group2', 'Group2', 'ParameterValue', 'this is Group 2'
    }
Microsoft.PowerShell.Core\Register-ArgumentCompleter -CommandName Test-Group -ParameterName GrpSelec -ScriptBlock $Resultss

Function Test-Group{
    param(
        
        [string[]]$GrpSelec)
  if(!$PSBoundParameters.ContainsKey('GrpSelec')){

$AllGroups = @("Group1", "Group2")

for($i=0; $i -lt $AllGroups.Count; $i++){
    Write-Host "$($i): $($AllGroups[$i])"}

$GrpSelec = Read-Host -Prompt "Select Group(s)" 
$GrpSelec = $GrpSelec -split " "}
$swap = Switch -exact ($GrpSelec){            
            {$_ -eq 0 -or $_ -eq "Group1"}  {"$Group1"}
            {$_ -eq 1 -or $_ -eq "Group2"}  {"$Group2"}
            }
Foreach($Group in $swap){
    "$Group"}      
    }

输出：

PS C:\WINDOWS\system32> Test-Group -GrpSelec Group1
1st Group 2nd Group

PS C:\WINDOWS\system32> Test-Group
0: Group1
1: Group2
Select Group(s): 0
1st Group 2nd Group

输出应该是什么样子：

1st Group
2nd Group

希望这对比我聪明的人有意义！我还尝试将我的脚本与该脚本的回答方式相关联，但无法使其正常工作： 这里

标签： powershellpowershell-5.0

Answer 1

继续我的评论。

对您的代码进行小幅更新，以允许对 -GrpSelec 参数进行 IntelliSense/Tab-Completion 并保留您的参数竞争对手/帮助消息。

$Group1 = @("1st Group", "2nd Group")
$Group2 = @("3rd Group", "4th Group")

$Resultss = {
    New-Object System.Management.Automation.CompletionResult 'Group1', 'Group1', 'ParameterValue', 'this is Group 1'
    New-Object System.Management.Automation.CompletionResult 'Group2', 'Group2', 'ParameterValue', 'this is Group 2'
}

Microsoft.PowerShell.Core\Register-ArgumentCompleter -CommandName Test-Group -ParameterName GrpSelec -ScriptBlock $Resultss

Function Test-Group
{
    param
    (
        [ValidateSet(
                        '0', 
                        '1', 
                        'Group1', 
                        'Group2', 
                        '0: Group1', 
                        '1: Group2' 
                    )]
        [string[]]$GrpSelec
    )

    if(!$PSBoundParameters.ContainsKey('GrpSelec'))
    {

    $AllGroups = @('Group1', 'Group2')

    for($i=0; $i -lt $AllGroups.Count; $i++)
    {Write-Host "$($i): $($AllGroups[$i])"}

    $GrpSelec = Read-Host -Prompt 'Select Group(s)'
    $GrpSelec = $GrpSelec -split ' '
    }

    $swap = Switch -exact ($GrpSelec)
            {            
                {$PSItem -eq 0 -or $PSItem -eq 'Group1' -or $PSItem -eq '0: Group1'}  {$Group1}
                {$PSItem -eq 1 -or $PSItem -eq 'Group2' -or $PSItem -eq '0: Group2'}  {$Group2}
            }

    Foreach($Group in $swap)
    {$Group}
}

Test-Group
# Results
<#
 Test-Group
0: Group1
1: Group2
Select Group(s): 

Select Group(s): 1
3rd Group
4th Group
#>

Test-Group -GrpSelec 0
<#
a space or tab pops IntelliSense for the selection list.

Test-Group -GrpSelec 0
1st Group
2nd Group
#> 

(Get-Command Test-Group).Parameters.Values.Attributes
# Results
<#
Position                        : 0
ParameterSetName                : __AllParameterSets
Mandatory                       : False
ValueFromPipeline               : False
ValueFromPipelineByPropertyName : False
ValueFromRemainingArguments     : False
HelpMessage                     : 
HelpMessageBaseName             : 
HelpMessageResourceId           : 
DontShow                        : False
TypeId                          : System.Management.Automation.ParameterAttribute

IgnoreCase  : True
ValidValues : {0, 1, Group1, Group2, 0: Group1, 1: Group2}
TypeId      : System.Management.Automation.ValidateSetAttribute

TransformNullOptionalParameters : True
TypeId                          : System.Management.Automation.ArgumentTypeConverterAttribute
#>

根据我们关于动态完成器/验证集示例的评论交流进行更新。

function Test-DynamicArgumentCompleter
{
    [CmdletBinding()]
    [Alias('tdac')]
    param
    (
        [Parameter(Mandatory)]
        [ArgumentCompleter(
        {
            Get-ChildItem -Path 'C:\Scripts' -Name |
            ForEach-Object {
                if ($PSitem -like '* *'){"'$PSitem'"}
                else {$PSitem}
            }
        })][string]$FileName
    )

    "Chosen file name: $FileName"
}



function Test-DynamicValidateSet 
{
    [CmdletBinding()]
    [Alias('tdvs')]
    Param ()
 
    DynamicParam {

            $ParameterName = 'Path'
            $RuntimeParameterDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary

            $AttributeCollection = New-Object System.Collections.ObjectModel.Collection[System.Attribute]
            
            $ParameterAttribute = New-Object System.Management.Automation.ParameterAttribute
            $ParameterAttribute.Mandatory = $true
            $ParameterAttribute.Position = 1

            $AttributeCollection.Add($ParameterAttribute)

            $arrSet = Get-ChildItem -Path '.\' -Directory | 
            Select-Object -ExpandProperty FullName

            $ValidateSetAttribute = New-Object System.Management.Automation.ValidateSetAttribute($arrSet)

            $AttributeCollection.Add($ValidateSetAttribute)

            $RuntimeParameter = New-Object System.Management.Automation.RuntimeDefinedParameter($ParameterName, [string], $AttributeCollection)
            $RuntimeParameterDictionary.Add($ParameterName, $RuntimeParameter)
            return $RuntimeParameterDictionary
    }

    begin 
    {$Path = $PsBoundParameters[$ParameterName]}

    process 
    {dir -Path $Path}
}