Powershell 如何将哈希表数组转换为字符串数组
如何将哈希表数组转换为字符串数组 我试图创建一个简单的菜单,允许用户从列表中选择服务器。以下是列表示例:Powershell 如何将哈希表数组转换为字符串数组,powershell,powershell-4.0,Powershell,Powershell 4.0,如何将哈希表数组转换为字符串数组 我试图创建一个简单的菜单,允许用户从列表中选择服务器。以下是列表示例: $sqlServers = @(@{key="LOCALDB"; serverName="(localdb)\mssqllocaldb"; credentials="-E"; userEntry="L"; menuText="(L)ocaldb`t`t((localdb)\mssqllocaldb)"},
$sqlServers = @(@{key="LOCALDB"; serverName="(localdb)\mssqllocaldb";
credentials="-E"; userEntry="L";
menuText="(L)ocaldb`t`t((localdb)\mssqllocaldb)"},
@{key="DEV"; serverName="DEV_SERVER";
credentials="-E"; userEntry="D";
menuText="(D)ev`t`t`t(DEV_SERVER)"},
@{key="TEST"; serverName="TEST_SERVER";
credentials="-E"; userEntry="T";
menuText="(T)est`t`t`t(TEST_SERVER)"})
这将显示为:
(L)ocaldb ((localdb)\mssqllocaldb)
(D)ev (DEV_SERVER)
(T)est (TEST_SERVER)
我想从我的服务器列表中读取有效用户选择列表,然后检查用户按下的键是否在该有效选择列表中。到目前为止,我得到的是:
function Get-UserSelection (
[Parameter(Mandatory=$True)]
$servers
)
{
Write-Host "Select the server to run the SQL scripts on (type a letter followed by the [Enter] key, or press CTRL+C to exit)"
foreach ($server in $servers)
{
Write-Host "`t" $server.menuText
}
$validSelections = $servers | Select-Object {$_.userEntry}
$userSelection = ""
while ($True)
{
$userSelection = Read-Host
ForEach ($validSelection in $validSelections)
{
if ($userSelection -eq $validSelection)
{
return $userSelection
}
}
Write-Host "Invalid selection. Please try again or press CTRL+C to exit"
}
}
问题是,$validSelection
的值不是L
或D
,而是在强制转换到字符串时具有类似@{$\uu0.userEntry=L}
的值,因此$userSelection(例如“D”)
永远不会被视为有效
我想问题就在这条线上
$validSelections = $servers | Select-Object {$_.userEntry}
我如何修改它,使
$validSelections
成为字符串的数组,而不是自定义对象的数组?您就快到了。只需使用ForEach对象
cmdlet迭代每个哈希表并选择userEntry的值
:
$validSelections = $sqlServers | ForEach-Object {$_.userEntry}