我正在为PowerShell脚本使用参数，但我发现如果第二个参数没有设置，它就会变得垃圾，尽管我可能做错了什么，因为我很难找到带有两个传入参数的示例。我如何验证这两个参数都已设置？
这个脚本是从一个很老的perl脚本调用的，如下所示：

#`"C:\\Program Files\\PowerShell\\7\\pwsh.exe" -NoProfile -noninteractive -ExecutionPolicy bypass -Command "\\\\wserverp01\\kiosksupport\\Retailer_DeviceSN\\MoveSNToSprdsht_1.0.ps1 $service_report_xls"`;

在我的脚本MoveSNToSprdsht_1.0.ps1中：

$out_pth = ""
$outFilePathExcel_pl = ""
$outFilePathExcel_pl = $Args[0]
$out_pth = $Args[1]  #this is blob scan output dir that we look for correct date file in
Write-Host "new tab will go to:$($outFilePathExcel_pl)" 
Write-Host "Will get files from:$($out_pth)"  #this had garbage in it, like terminal output from something I ran yesterday that's unrelated

我在想也许我不应该使用$Args 1，并找到了this example，但它没有说在脚本中使用-arg 1和-arg 2做什么。我现在使用VisualStudioCode运行PowerShell来测试它，所以有可能我从VSC命令行错误地执行它。当我使用旧的perl脚本中粘贴的perl行时，它与第一个参数工作正常，但我现在已经添加了第二个参数。
我在搜索中没有找到如何验证脚本参数是否确实设置。我尝试检查空字符串，但没有成功。某些东西用垃圾填充了Arg 1，因此检查空字符串失败。

更新日期：

那么如果我使用CmdletBinding，这会是一个好的程序结构吗？程序会以正常的方式运行吗？

[cmdletbinding()]
  Param ( [Parameter(Mandatory)][string]$outFilePathExcel_pl,  [Parameter(Mandatory)][string]$out_pth="\\wserverp01\support\Retailer_SN\OutputSprdsht\")

#and the rest of the program...
Get-ChildItem $out_pth | Foreach-Object {$lastupdatetime=$_.LastWriteTime;$nowtime = get-date; if (($nowtime - $lastupdatetime).totalhours -le 72) {write-host "here2";$excel_File_from = $_.Name;write-host $_.name}}
..

**Update 2：**希望我正确调用powershell脚本，下面，每个评论。

my $resultPS = `"C:\\Program Files\\PowerShell\\7\\pwsh.exe" -NoProfile -noninteractive -ExecutionPolicy bypass -File "\\\\wserverp01\\support\\Retailer_SN\\MoveSNToSprdsht_1.0.ps1" "-outFilePathExcel_pl $service_report_xls" "-out_pth $cvs_blob_scan_dir"`;

调用更新的powershell脚本：

[cmdletbinding()]
param( [Parameter(Mandatory)][string]$outFilePathExcel_pl,  [Parameter()][string]$out_pth="\\wserverp01\support\Retailer_SN\OutputSprdsht\")

Start-Transcript -path '\\wserverp01\support\Retailer_SN\Logs\MoveSNToSprdsht.log' 
#get file location from parameter so put sn tab there

Write-Host "new tab will go to:$($outFilePathExcel_pl)" 
Write-Host "Will get scan files from:$($out_pth)"

#make sure params are valid paths; non-terminating error if invalid
if(Test-Path $outFilePathExcel_pl)
{
    Write-Host "path for $outFilePathExcel_pl looks good"
}
else 
{
    Write-Error "path for $outFilePathExcel_pl invalid" 
}
if(Test-Path $out_pth)
{
    Write-Host "path for $out_pth looks good"
}
else 
{
    Write-Error "path for $outFilePathExcel_pl invalid"
}

Get-ChildItem $out_pth | Foreach-Object {$lastupdatetime=$_.LastWriteTime;$nowtime = get-date; if (($nowtime - $lastupdatetime).totalhours -le 72) {write-host "here2";$excel_File_from = $_.Name;write-host $_.name}}

更新3：

由于某种原因，当我从perl使用命名参数并从powershell使用它们时，我得到

Cannot bind argument to parameter 'Path' because it is an empty string.

当我尝试使用变量时。我的语法有问题吗？
Perl：

my $resultPS = `"C:\\Program Files\\PowerShell\\7\\pwsh.exe" -NoProfile -noninteractive -ExecutionPolicy bypass -File "\\\\wserverp01\\support\\Retailer_SN\\MoveSNToSprdsht_1.0.ps1" -outFilePathExcel_pl "$service_report_xls" -out_pth "$retailer_blob_scan_dir"`;

（其中变量是从一个ini文件中设置的，并作为参数传递给脚本，在perl中，powershell调用之前的打印输出看起来不错）
然后在MoveSNToSprdsht_1.0.ps1中：

[cmdletbinding()]
param( [Parameter(Mandatory)][string]$outFilePathExcel_pl,  [Parameter()][string]$out_pth="\\wserverp01\support\Retailer_SN\OutputSprdsht\")

Start-Transcript -path '\\wserverp01\support\Retailer_SN\Logs\MoveSNToSprdsht.log' 
#get file location from parameter so put sn tab there

Write-Host "new tab will go to:$($outFilePathExcel_pl)" #need to use below instead of $outFilePathExcel############################
Write-Host "Will get blob scan files from:$($out_pth)"

#make sure params are valid paths; non-terminating error if invalid
if(Test-Path $outFilePathExcel_pl)
{
    Write-Host "path for $outFilePathExcel_pl looks good"
}
else 
{
    Write-Error "path for $outFilePathExcel_pl invalid" 
}
if(Test-Path $out_pth)
{
    Write-Host "path for $out_pth looks good"
}
else 
{
    Write-Error "path for $out_pth invalid"
}

[System.String] $excel_File_from = ""

############## hours - 72 hours is ok for now so we don't cut it too close for file timestamp for scan..scan run on weekend, use Monday:
Get-ChildItem $out_pth | Foreach-Object {$lastupdatetime=$_.LastWriteTime;$nowtime = get-date; if (($nowtime - $lastupdatetime).totalhours -le 72) {write-host "here2";$excel_File_from = $_.Name;write-host $_.name}}

也许我需要在cmdlet绑定下面使用花括号？如果错误是抱怨使用了空参数，而不是错误的格式。