powershell - 传递SwitchParameter作为参数

Question

我想知道如何将SwitchParameter作为参数传递。

function ExecuteWindowsTaskScheduler {
    param(
          [Parameter(Mandatory=$true)] [String] $TaskName #e.g. "Open Notepad task"
        , [Parameter(Mandatory=$true)] [String] $TimeToExecute #e.g. "3:45pm/am"
        , [Parameter(Mandatory=$true)] [System.Management.Automation.SwitchParameter] $FrequencyToExecute #e.g. -Once, -Daily, -Weekly, -DaysInterval...
        , [Parameter(Mandatory=$true)] [String] $DomainAndUser #e.g. "yourdomain\yourusername"
        , [Parameter(Mandatory=$true)] [String] $ProgramWithPath #e.g. "C:\PowerShell\yourFile.ps1"
        , [Parameter(Mandatory=$false)] [bool]  ${DebugMode}
        )



    $Trigger= New-ScheduledTaskTrigger -At $TimeToExecute -Once # Specify the trigger settings
    $Action= New-ScheduledTaskAction -Execute "PowerShell.exe" -Argument $ProgramWithPath # Specify what script to run and with its parameters
    $TaskExists= Get-ScheduledTask | Where-Object {$_.TaskName -like $TaskName }

    Register-ScheduledTask -TaskName $TaskName -Trigger $Trigger -User $DomainAndUser -Action $Action

}

ExecuteWindowsTaskScheduler "Open Notepad task" "11:56am" -Once "xxx\yyy" "C:\PowerShell\OpenNotepad.ps1" 

我有参数$FrequencyToExecute，当我调用该函数时，我希望能够传递以下命令之一:-Once，-Daily，-Weekly等。

可能吗？我怎样才能做到这一点？

Answer 1

您可能需要将参数类型更改为[string]，然后使用[ValidateSet]属性来强制执行“Once”，“Daily”或“Weekly”值，然后使用splatting将适当的开关传递给New-ScheduledTaskTrigger:

function ExecuteWindowsTaskScheduler {
    param(
        [Parameter(Mandatory = $true)]
        [String]$TaskName, #e.g. "Open Notepad task"

        [Parameter(Mandatory = $true)]
        [String]$TimeToExecute, #e.g. "3:45pm/am"

        [Parameter(Mandatory = $true)]
        [ValidateSet('Once','Daily','Weekly','Monthly')]
        [string]$FrequencyToExecute, #e.g. -Once, -Daily, -Weekly, Monthly

        [Parameter(Mandatory = $true)]
        [String]$DomainAndUser, #e.g. "yourdomain\yourusername"

        [Parameter(Mandatory = $true)]
        [String]$ProgramWithPath, #e.g. "C:\PowerShell\yourFile.ps1"

        [Parameter(Mandatory = $false)]
        [bool]${DebugMode}
    )

    $TriggerParams = @{
        At = $TimeToExecute
    }
    # Add the appropriate frequency value to the splatting table
    if ($FrequencyToExecute -eq 'Monthly') {
        $TriggerParams.Add('Weekly',$true)
        $TriggerParams.Add('WeeksInterval',4)
        $TriggerParams.Add('DaysOfWeek','Monday')
    }
    elseif ($FrequencyToExecute -eq 'Weekly') {
        $TriggerParams.Add('Weekly',$true)
        $TriggerParams.Add('WeeksInterval',1)
        $TriggerParams.Add('DaysOfWeek','Monday')
    }
    else {
        $TriggerParams.Add($FrequencyToExecute,$true)
    }

    $Trigger = New-ScheduledTaskTrigger @TriggerParams

    $Action = New-ScheduledTaskAction -Execute "PowerShell.exe" -Argument $ProgramWithPath # Specify what script to run and with its parameters
    $TaskExists = Get-ScheduledTask | Where-Object {$_.TaskName -like $TaskName }

    Register-ScheduledTask -TaskName $TaskName -Trigger $Trigger -User $DomainAndUser -Action $Action
}