如何将哈希表数组转换为字符串数组?
我尝试创建一个简单的菜单,允许用户从列表中选择服务器。这是列表的一个示例:
$sqlServers = @(@{key="LOCALDB"; serverName="(localdb)\mssqllocaldb";
credentials="-E"; userEntry="L";
menuText="(L)ocaldb`t`t((localdb)\mssqllocaldb)"},
@{key="DEV"; serverName="DEV_SERVER";
credentials="-E"; userEntry="D";
menuText="(D)ev`t`t`t(DEV_SERVER)"},
@{key="TEST"; serverName="TEST_SERVER";
credentials="-E"; userEntry="T";
menuText="(T)est`t`t`t(TEST_SERVER)"})
这将显示如下:
(L)ocaldb ((localdb)\mssqllocaldb)
(D)ev (DEV_SERVER)
(T)est (TEST_SERVER)
我想从我的服务器列表中读取有效用户选择列表,然后检查用户按下的密钥是否在有效选项列表中。这是我到目前为止所得到的:
function Get-UserSelection (
[Parameter(Mandatory=$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 $userSelection
}
}
Write-Host "Invalid selection. Please try again or press CTRL+C to exit"
}
}
问题在于$validSelection
,而不是L
或D
的值,在转换为字符串时具有@{$_.userEntry=L}
的值,因此{ {1}}从未被视为有效。
我认为问题出在
行$userSelection (eg "d")
如何修改此内容,以便$validSelections = $servers | Select-Object {$_.userEntry}
是字符串数组而不是自定义对象数组?
答案 0 :(得分:1)
你快到了。只需在每个哈希表上使用ForEach-Object
cmdlet 迭代,然后选择userEntry
的值:
$validSelections = $sqlServers | ForEach-Object {$_.userEntry}