我有这个脚本。但是运行脚本时出现此错误。

Write-Host：无法将参数'ForegroundColor'绑定到目标。例外设定 “ ForegroundColor”：“由于枚举值，无法将null转换为类型” System.ConsoleColor“ 无效的。指定以下枚举值之一，然后重试。可能的 枚举值是“黑色，深蓝色，深绿色，深青色，深红色，深洋红色，深黄色，灰色，深 kGray，蓝色，绿色，青色，红色，洋红色，黄色，白色”。 在C：\ Scripts \ DA \ volCheck.ps1：49 char：33 +写主机$ _ -ForegroundColor $ color + ~~~~~~     + CategoryInfo：WriteError：（:) [Write-Host]，ParameterBindingException     + FullyQualifiedErrorId：ParameterBindingFailed，microsoft.PowerShell.Commands.WriteHostComm    和

请帮助，非常感谢。

函数volcheck {     参数（         [参数（必填）]         [string] $ PClist     ）

$servers = Get-Content -Path $PClist    

cls
Write-Host "`nChecking Disk Space:`n" -ForegroundColor Green
$obj = @()
Foreach ($server in $servers) {
    If (Test-Connection -Computername $server -Count 2 -Quiet) {
        #$volumes = (Get-Wmiobject Win32_Volume -ComputerName $server -Credential $cred -Filter "DriveType = 3")
        $volumes = (Get-Wmiobject Win32_Volume -ComputerName $server -Filter "DriveType = 3")
        Foreach ($vols in $volumes) {
            $FreePerc = [math]::round(((($vols.FreeSpace / 1GB)/($vols.Capacity / 1GB)) * 100),0)

            if ($FreePerc -ge 20) {
                $StatusProperty = "OK"
            }
            elseif ($FreePerc -ge 15 ) {
                $StatusProperty = "Warning"
            }
            else {
                $StatusProperty = "Critical"
            }

            $obj += $vols | Select @{Name = "Server"; Expression = {$server}},Name,Label,DriveLetter,FileSystem,@{Name = "Capacity(GB)"; Expression = {[math]::round(($_.Capacity / 1GB),2)}},@{Name = "FreeSpace(GB)"; Expression = {[math]::round(($_.FreeSpace / 1GB),@{Name = "PctFree"; Expression = {$FreePerc}},@{Name = "Status"; Expression = {$StatusProperty}}

            $obj.psobject.typenames.insert(0,"MyDiskUsage")
        }
    } else {
            Write-Host "$server not pingable"`n  -ForegroundColor Red
    }   
}
$strings = ($obj | Format-Table -Auto | Out-String).Trim().split("`n")
$strings | select -first 2 | write-host -ForegroundColor Cyan
$strings | select -Skip 2 | foreach {
    Switch -regex ($_) {
        "OK" { $color = "Green" }
        "Warning" { $color = "Yellow" }
        "Critical" {$color = "Red" }
    }
Write-Host $_ -ForegroundColor $color
}
write-Host "`n"
pause

}