如何在PowerShell中将数组对象转换为一个对象？

Question

我有这个脚本：

$i = 0
$Destination_Server = @()

foreach ($row in $Table | where { $_.cube_name -match "$CUBE" }) {
    $i++
    $Destination_Server += $row.Item("process_server") 

    if (-not ($Destination_Server)) {
        Write-Host "`r`n > Server: N/A...ensure CUBE << $CUBE_input >> exists in the table"
    } else { 
        Write-Host "`r`n` > Server $($i):" $Destination_Server[-1]
    }
}

$Destination_Server | Select-Object -Unique

Invoke-ASCmd -InputFile $JSON_file -Server $Destination_Server >$process_output

运行它时，它会抱怨

Invoke-ASCmd : Cannot convert 'System.Object[]' to the type 'System.String'
required by parameter 'Server'.

+ ... nvoke-ASCmd -InputFile $JSON_file -Server $Destination_Server >$proce ...

由于$Destination_Server返回一个唯一值，为什么调用命令会出现问题？它应该只接受一个已传递的值。