Get Azure VM PowerState in C#/dotnet using Azure.ResourceManager

Question

I want to get the PowerState (on/off/restarting, etc.) of a known Azure VM instance in a C#/dotnet application using Azure.ResourceManager (not PowerShell, not CLI, not REST, not using any deprecated Fluent approach).

I can do it successfully with REST so I know the underlying VM InstanceView data exists, but for this application REST will not pass muster.

I am using the following code; vm.Data.Name comes back as expected, but am getting null responses from InstanceView.Statuses.

I haven't been able to find any helpful MSFT documentation, except for old, deprecated approaches.

Does anyone know how to get PowerState via Azure.ResourceManager, or why I am getting NULL back?

Thanks!!

[code sample updated below on 1/16/23, changed auth approach, InstanceView still returning NULL]

using Azure;
using Azure.Identity;
using Azure.ResourceManager;
using Azure.ResourceManager.Compute;
using Azure.ResourceManager.Compute.Models;
using Azure.ResourceManager.Resources;

namespace Test
{
    public class Program
    {
        public static async Task ListAllVms()
        {
            ArmClient armClient = new ArmClient(new DefaultAzureCredential());
            SubscriptionResource subscription = await armClient.GetDefaultSubscriptionAsync();
            string rgName = "redacted";
            ResourceGroupResource resourceGroup = await subscription.GetResourceGroups().GetAsync(rgName);
            VirtualMachineCollection vmCollection = resourceGroup.GetVirtualMachines();
            AsyncPageable<VirtualMachineResource> response = vmCollection.GetAllAsync();
            
            await foreach (VirtualMachineResource vm in response)
            {
                Console.WriteLine(vm.Data.Name);
                foreach (InstanceViewStatus istat in vm.Data.InstanceView.Statuses)
                {
                    Console.WriteLine("\n  code: " + istat.Code);
                    Console.WriteLine("  level: " + istat.Level);
                    Console.WriteLine("  displayStatus: " + istat.DisplayStatus);
                }
            }
        }

        public static async Task Main(string[] args)
        {
            await ListAllVms();
        }
    }
}

Answer 1

After reproducing from my end, I could able to achieve this using vm.Get().Value.InstanceView().Value.Statuses[1].DisplayStatus. Below is the complete code that worked for me where I list all the vm present in my resource group and get the statuses of it.

using System;
using System.Threading.Tasks;
using Azure;
using Azure.Identity;
using Azure.ResourceManager;
using Azure.ResourceManager.Compute;
using Azure.ResourceManager.Compute.Models;
using Azure.ResourceManager.Resources;

namespace ConsoleApp1
{
    class Program
    {
        static async Task Main(string[] args)
        {
            ArmClient armClient = new ArmClient(new InteractiveBrowserCredential(new InteractiveBrowserCredentialOptions() { TenantId = "<YOUR_TENAT_ID>" }));
            SubscriptionResource subscriptionResource = await armClient.GetDefaultSubscriptionAsync();

            string rgName = "<YOUR_RESOURCE_GROUP>";
            ResourceGroupResource resourceGroupResource = await subscriptionResource.GetResourceGroups().GetAsync(rgName);

            VirtualMachineCollection vmCollection = resourceGroupResource.GetVirtualMachines();
    
            // Lists all virtual machines
            AsyncPageable<VirtualMachineResource> vmList = vmCollection.GetAllAsync();
            Console.WriteLine("Listing");
            await foreach (VirtualMachineResource vm in vmList)
            {
                Console.WriteLine(vm.Data.Name);
                Console.WriteLine(vm.Get().Value.InstanceView().Value.Statuses[1].DisplayStatus);
            }
        }
    }
}

output: