编写PowerShell脚本：选择Azure VM并存储其名称与资源组信息

Got it, here's a practical PowerShell script that does exactly what you're asking for—plus some basic error handling to make sure it behaves smoothly even if the user enters invalid input:

# First, get all VMs in the current Azure subscription using AzureRm module
$allVMs = Get-AzureRmVM

# Check if any VMs exist in the subscription
if (-not $allVMs) {
    Write-Host "No virtual machines found in the current Azure subscription." -ForegroundColor Red
    exit
}

# Display VMs with numbered list for selection
Write-Host "`nList of Virtual Machines in your subscription:" -ForegroundColor Cyan
for ($i = 0; $i -lt $allVMs.Count; $i++) {
    Write-Host "$($i+1). VM Name: $($allVMs[$i].Name) | Resource Group: $($allVMs[$i].ResourceGroupName)"
}

# Prompt user for selection, with input validation
do {
    $userInput = Read-Host "`nEnter the number of the VM you want to select"
    # Check if input is a valid number within the list range
    if ($userInput -match '^\d+$' -and [int]$userInput -ge 1 -and [int]$userInput -le $allVMs.Count) {
        $selectedIndex = [int]$userInput - 1 # Convert to zero-based index
        break
    }
    else {
        Write-Host "Invalid input! Please enter a number between 1 and $($allVMs.Count)." -ForegroundColor Yellow
    }
} while ($true)

# Store selected VM's name and resource group in variables
$selectedVMName = $allVMs[$selectedIndex].Name
$selectedResourceGroup = $allVMs[$selectedIndex].ResourceGroupName

# Confirm the selection (optional but helpful for user feedback)
Write-Host "`nSuccessfully selected:" -ForegroundColor Green
Write-Host "VM Name: $selectedVMName"
Write-Host "Resource Group: $selectedResourceGroup"

Key Features Explained: #

• VM Check: First verifies if there are any VMs in the subscription—no need to proceed if there's nothing to select!
• Numbered List: Uses a loop to display each VM with a clear, user-friendly number (1-based instead of 0-based, since users don't think in zero indexes).
• Input Validation: Makes sure the user enters a valid number that's within the range of available VMs, so you avoid errors from typos or invalid entries.
• Variable Storage: Stores the selected VM's name and resource group in separate variables that you can use for subsequent operations (like starting/stopping the VM, modifying settings, etc.).

Quick Note: #

If you're using the newer Az module (recommended over AzureRm, which is deprecated), just replace Get-AzureRmVM with Get-AzVM in the script—it will work the same way.

内容的提问来源于stack exchange，提问作者szikk