從特定行回圈PS

我有這個腳本：我可以添加一個回圈嗎？在我輸入 ID 和 IP 并添加 'db.csv' 后，回傳再次詢問 $inputID 并回圈詢問輸入的 ID 或 IP 是否好（？）

我需要在這個腳本第一個回圈中使用 2 個“回圈”來確認輸入的資訊是否正確 >> 如果沒有回傳再次添加;; 在我添加 ID、IP 和腳本寫入 csv 新 ID 之后的第二個回圈再次進入腳本頂部，其中需要 $inputID 以輸入先前添加的最新 ID。

#### START SCRIPT #####

Add-Type -Path "C:\Program Files (x86)\WinSCP\WinSCPnet.dll"
 
$dbfile = "C:\test.csv"

$db = [System.Collections.Generic.List[object]]::new()
if (Test-Path -Path $dbfile -PathType Leaf) { $db.AddRange((Import-Csv -Path $dbfile)) }
$dbUpdated = $false 

while ($true) {
    While ( ($Null -eq $inputID) -or ($inputID -eq '') ) {
    $inputID = Read-Host -Prompt "Introduceti ID sau Tastati 'Q' for exit"  
} 
    if ($inputID -eq 'q') { break }

    $entry = $db | Where-Object { $_.HostName -eq $inputID }
    if ($entry) {
        Write-Host "$inputID Ok!" -ForegroundColor Green
        continue
    }

    Write-Host "$inputID nu exista in baza de date!" -ForegroundColor Red
    # ask for confirmation
    $title    = 'Adaugare ID nou?'
    $question = 'Doriti sa introduceti un ID nou in Baza de Date?'
    $choices  = '&Yes', '&No'
    $decision = $Host.UI.PromptForChoice($title, $question, $choices, 1)
    if ($decision -ne 0) {
        continue
    }

    do {
        $IP = Read-Host -Prompt "Introduceti IP pentru: $inputID"
    } while (![IPAddress]::TryParse($IP, [ref]$null))

    $db.Add([PsCustomObject]@{ HostName = $inputID; IP = $IP })
    Write-Host "Data : $inputID,$IP adaugat cu succes in baza de date!"
    $dbUpdated = $true
}

if ($dbUpdated) {
    $db | Export-Csv -Path $dbfile -NoTypeInformation -Force

    $dbTrimmer = Get-Content $dbfile
    $dbTrimmer.Replace('","', ",").TrimStart('"').TrimEnd('"') | Set-Content -Path $dbfile -Force -Confirm:$false 
}

# Script continue . If put correct ID run the script below if not Ask if want to add new ID after that return to ask ID (of course here I typed new ID witch I enter before in db) and run the scrit for that ID.

uj5u.com熱心網友回復：

我會在一個無限while {..}回圈中執行此操作，其中另一個do{..} while()用于關于 IP 的第二個問題。

此外，您可以從記憶體中完成所有操作，并且僅在用戶退出 while 回圈后才將資料寫入檔案（并且僅在進行了更新時）

像這樣的東西：

$dbfile =  "C:\test.csv"

# create a List object to store and update the data in memory
$db = [System.Collections.Generic.List[object]]::new()

# if the file can be found, import the data and add to the $db List 
if (Test-Path -Path $dbfile -PathType Leaf) { $db.AddRange((Import-Csv -Path $dbfile)) }

# create a flag to check later if an new entry was made
$dbUpdated = $false  

# enter an endless loop
while ($true) {
    $inputID = Read-Host -Prompt "Introduceti ID. Type 'Q' to exit"
    # break the loop if the user wants to stop
    if ($inputID -eq 'q') { break }  

    # test if the id is already in the $db collection
    $entry = $db | Where-Object { $_.HostName -eq $inputID }
    if ($entry) {
        Write-Host "$inputID Ok!" -ForegroundColor Green
        continue  # go back to asking for a new ID
    }

    Write-Host "$inputID nu exista in baza de date!" -ForegroundColor Red
    # ask for confirmation
    $title    = 'Add New ID?'
    $question = 'Doriti sa introduceti un ID nou in Baza de Date?'
    $choices  = '&Yes', '&No'
    $decision = $Host.UI.PromptForChoice($title, $question, $choices, 1)
    if ($decision -ne 0) {
        continue  # go back to asking for a new ID
    }

    # ask for IP for this new entry
    do {
        $IP = Read-Host -Prompt "Introduceti IP for $inputID"
    } while ([string]::IsNullOrWhiteSpace($IP))
    # you may want to change the 'while' condition above to 
    #   while (![IPAddress]::TryParse($IP, [ref]$null))
    # to ensure a valid IP address is entered.

    # add the given ID and IP to the $db collection in memory
    $db.Add([PsCustomObject]@{ HostName = $inputID; IP = $IP })
    Write-Host "Data : $inputID,$IP adaugat cu succes in baza de date!"
    $dbUpdated = $true
}

# here we can test if new entries have been added
if ($dbUpdated) {
    # overwrite the file with the updated info
    $db | Export-Csv -Path $dbfile -NoTypeInformation -Force

    # Apparently you don't want quotes in the CSV file, and in this case it would be safe enough to do
    $dbTrimmer = Get-Content $dbfile
    $dbTrimmer.Replace('","', ",").TrimStart('"').TrimEnd('"') | Set-Content -Path $dbfile -Force -Confirm:$false

    # but please be VERY careful with that because in other csv files, the fields may contain
    # Newlines, the delimiter character itself or quotes and if that is the case, the csv file 
    # will become unusable.. 
    # See https://stackoverflow.com/a/69705776/9898643 to do that safely. 
}

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