Question

我正在尝试编写一个简单的do..until循环，但它不起作用：

$yesNo = Read-Host -Prompt 'Do you want to add alternative DNS names or IPs into Certificate? Y/N: '

do {
    $dnsipname = Read-Host -Prompt "Please input DNS or IP as dns=alternativeCNname or ip=ipName: "
    Write-Output "$dnsipname" 
    $strQuit = Read-Host " do you want to add another DNS? (Y/N)"
    do {
        $dnsipname = Read-Host -Prompt "Please input DNS or IP as dns=alternativeCNname or ip=ipName: "
        Write-Output "$dnsipname" 
        Add-Content D:\Scripts\expiringCerts\request.inf '`r`n_continue_ = "$dnsipname"'
    } until ($strQuit -eq "Y" -or "y")
} until ($yesNo -eq "Y" -or "y")

这个只循环两次，但是每当我点击Y时它都应该循环但是当我点击N或n它应该会中断。

有什么想法吗？

Answer 1

在PowerShell中，您基本上有三个选项可以提示用户选择是/否。

Read-Host cmdlet：

$msg = 'Do you want to add alternative DNS names or IPs into Certificate? [Y/N]'
do {
    $response = Read-Host -Prompt $msg
    if ($response -eq 'y') {
        # prompt for name/address and add to certificate
    }
} until ($response -eq 'n')

如果您想忽略回复中的尾随字符，请使用-like 'y*'和-like 'n*'。

PromptForChoice()方法：

$title = 'Certificate Alternative Names'
$msg   = 'Do you want to add alternative DNS names or IPs?'

$yes = New-Object Management.Automation.Host.ChoiceDescription '&Yes'
$no  = New-Object Management.Automation.Host.ChoiceDescription '&No'
$options = [Management.Automation.Host.ChoiceDescription[]]($yes, $no)
$default = 1  # $no

do {
    $response = $Host.UI.PromptForChoice($title, $msg, $options, $default)
    if ($response -eq 0) {
        # prompt for name/address and add to certificate
    }
} until ($response -eq 1)

choice命令：

$msg = 'Do you want to add alternative DNS names or IPs into Certificate'
do {
    choice /c yn /m $msg
    $response = $LASTEXITCODE
    if ($response -eq 0) {
        # prompt for name/address and add to certificate
    }
} until ($response -eq 1)

Answer 2

我认为你不需要两个do-until循环。我也希望do-while（当他确认y或Y时）。

Add-Content上的字符串插值不起作用，因为您使用单引号。我会在这里使用格式字符串：

$yesNo = Read-Host -prompt 'Do you want to add alternative DNS names or IPs into Certificate? Y/N: '
if ($yesNo -eq 'y')
{
    do 
    {
        $dnsipname = read-host -prompt "Please input DNS or IP as dns=alternativeCNname or ip=ipName: "
        Write-output "$dnsipname" 
        Add-Content -Path "D:\Scripts\expiringCerts\request.inf" -value ('`r`n_continue_ = "{0}"' -f $dnsipname)
        $strQuit = Read-Host " do you want to add another DNS? (Y/N)"                
    }
    while($strQuit -eq 'y')
}

Answer 3

您需要在until语句中对do语句（对于您的示例中为$ strQuit）进行评估，以便更新它。

在do语句中包装if循环也会使用户在继续提示之前向用户提供更友好的信息。

$dnsipname = read-host -prompt "Please input DNS or IP as dns=alternativeCNname or ip=ipName: "
Write-Output $dnsipname
Add-Content D:\Scripts\expiringCerts\request.inf '`r`n_continue_ = "$dnsipname"'

if ((Read-Host "Do you want to add another DNS or IP? (Y/N)") -eq "Y") {
    do {
        $dnsipname = Read-Host "Please input DNS or IP as dns=alternativeCNname or ip=ipName: "
        Write-output "$dnsipname" 
        Add-Content D:\Scripts\expiringCerts\request.inf '`r`n_continue_ = "$dnsipname"'
        $strQuit = Read-Host "Do you want to add another DNS or IP? (Y/N)"
    }
    until ($strQuit -eq "N")
}

直到用户输入是/否

3 个答案: