C#调用Azure REST API时，如何编程获取Azure Subscription ID？

Absolutely! You can fetch Azure Subscription IDs using the Azure Management REST API with your existing access token. Here's a step-by-step breakdown and code example to help you out:

Prerequisites #

First, make sure your Azure AD application (the one you used to get the access token) has the Microsoft.Subscriptions/subscriptions/read permission assigned. You’ll need to add this permission from the Azure Portal’s App Registration section, and grant admin consent if required for your organization.

Step 1: Call the Azure Management API Endpoint #

Use this REST endpoint to retrieve all subscriptions the authenticated identity has access to:

GET https://management.azure.com/subscriptions?api-version=2020-01-01

Step 2: C# Code Implementation #

Here’s a complete example using HttpClient to send the request, authenticate with your access token, and parse the response:

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Newtonsoft.Json;

// Helper classes to deserialize the API response
public class SubscriptionResponse
{
    public Subscription[] Value { get; set; }
}

public class Subscription
{
    public string Id { get; set; }
    public string Name { get; set; }
    public string SubscriptionId { get; set; }
    public string TenantId { get; set; }
}

class Program
{
    static async Task Main(string[] args)
    {
        string accessToken = "YOUR_VALID_ACCESS_TOKEN"; // Replace with your actual token
        string apiEndpoint = "https://management.azure.com/subscriptions?api-version=2020-01-01";

        using (HttpClient client = new HttpClient())
        {
            // Attach the access token to the request header
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
            
            HttpResponseMessage response = await client.GetAsync(apiEndpoint);
            response.EnsureSuccessStatusCode(); // Throws an exception if the request fails

            // Parse the JSON response
            string responseContent = await response.Content.ReadAsStringAsync();
            SubscriptionResponse subscriptionResponse = JsonConvert.DeserializeObject<SubscriptionResponse>(responseContent);

            // Print out all available subscriptions
            foreach (var sub in subscriptionResponse.Value)
            {
                Console.WriteLine($"Subscription Name: {sub.Name}");
                Console.WriteLine($"Subscription ID: {sub.SubscriptionId}\n");
            }
        }
    }
}

Quick Notes #

• If the authenticated identity has access to multiple subscriptions, this endpoint will return all of them. You can filter results by Name or other properties if you need a specific subscription.
• Double-check that your access token includes the correct scope for the Azure Management API (usually https://management.azure.com/.default when requesting the token initially).

内容的提问来源于stack exchange，提问作者Balaji