返回空行Get_Item哈希表 - Powershell

Question

$searchterm = read-host “Enter search term for uninstallers”
$uninstallers = get-childitem HKLM:SOFTWAREWow6432NodeMicrosoftWindowsCurrentVersionUninstall
$founditems = $uninstallers | ? {(Get-ItemProperty -path (“HKLM:”+$_.name) -name Displayname -erroraction silentlycontinue) -match $searchterm}
write-host “Searched registry for uninstall information on $searchterm”
write-host “——————————————”
$x = 0
$uninstallcommandtable = @{}
$uninstalldisplaytable = @{}
if ($founditems -eq $null) {“None found”} else {
    write-host “Found “($founditems | measure-object).count” item(s):`n”
    $founditems | % {
        $x = $x + 1
        Write-host "Item: $x"
        Write-host “Displayname: “$_.getvalue(“Displayname”)
        Write-host “Displayversion: “$_.getvalue(“Displayversion”)
        Write-host “InstallDate: “$_.getvalue(“InstallDate”)
        Write-host “InstallSource: “$_.getvalue(“InstallSource”)
        Write-host “UninstallString: “$_.getvalue(“UninstallString”)
    $uninstallcommandtable.Add($x, $_.getvalue(“UninstallString”))
    $uninstalldisplaytable.Add($x, $_.getvalue(“Displayname”))
        Write-host “`n”
    }
}
Write-host ($uninstalldisplaytable | Out-String)
$whichprogram = read-host "Which program do you want to uninstall?"
Write-host ($uninstallcommandtable.Get_Item($whichprogram) | Out-String)

由于某种原因，最后一个写入主机返回一个空行。我在最后一个读取主机之前验证了测试输出，所以我知道$uninstallcommandtable是正确的。任何想法都会很棒。

Answer 1

因为您的哈希表名称是类型 System.Int32 .这将向您显示：

$uninstallcommandtable.Keys | % {$_.GetType().FullName}

Read-Host正在设置一个类型为 System.String 的变量。因此，您需要将字符串转换为如下所示的System.Int32：

Write-host $uninstallcommandtable.Get_Item([Int32] $whichprogram)

您还可以使用：

Write-host $uninstallcommandtable.Item([Int32] $whichprogram)

Answer 2

或者，您可以在创建哈希条目时将密钥设置为字符串：

$uninstallcommandtable.Add("$x", $_.getvalue(“UninstallString”))