使用PSRemotingJob实现动态菜单时出现IndexOf错误咨询

PowerShell 对管道返回结果有自动拆包逻辑：当筛选结果仅为1个时，变量会被赋值为单个对象而非数组。你遇到的报错正是因为$jobList在仅匹配到1个任务时，类型为PSRemotingJob单个对象，不存在数组专属的IndexOf()方法。

方案1（最小改动）：强制将返回结果转为数组 #

只需要修改$jobList的赋值语句，用@()包裹查询逻辑，无论返回结果数量多少，都会统一封装为数组类型，原有代码逻辑无需其他修改：

# 原行：$jobList = Get-Job | Where-Object {$_.State -ieq 'Completed'-and $_.Name -like "*-Repair"}
# 修改为：
$jobList = @(Get-Job | Where-Object {$_.State -ieq 'Completed'-and $_.Name -like "*-Repair"})

方案2（更稳妥的优化）：手动维护序号计数器 #

不依赖IndexOf()方法，遍历的同时自己计数，逻辑更清晰，也不会出现类型不匹配的问题，完整修改后的代码如下：

Write-Host "`nCurrent Repair States:"
(Get-Job | Where-Object {$_.State -ieq 'Completed' -or $_.State -ieq 'Running' -and $_.Name -like "*-Repair"}) | Format-Table Name, State -HideTableHeaders

# 强制转数组，保证Count属性始终正确
$jobList = @(Get-Job | Where-Object {$_.State -ieq 'Completed'-and $_.Name -like "*-Repair"})
Write-Host "Selectable Completed SCCM Client Repairs:`n"

# 手动维护菜单序号
$menuNum = 1
Foreach ($menuItem in $jobList) {
    "  {0}.`t{1}" -f $menuNum, $menuItem.Name
    $menuNum++
}

$jobChoice = ''
while ([string]::IsNullOrWhiteSpace($jobChoice)) {
    $jobChoice = Read-Host "`nPlease choose the Machine by number"
    if ($jobChoice -inotin 1..$jobList.Count) {
        Write-Host
        Write-Host ('    Please try again ...') -Foreground Yellow
        Write-Host
                
        $jobChoice = ''
    }
}

# 选中的任务可通过下方代码获取
# $selectedRepairJob = $jobList[[int]$jobChoice - 1]

内容的提问来源于stack exchange，提问作者kinaw