向SharePoint Online C#进行身份验证

using Microsoft.Identity.Client;
using System;
using System.Net.Http;
using System.Threading.Tasks;

public class SharePointAuth
{
    private const string TenantId = "your-tenant-id";
    private const string ClientId = "your-client-id";
    private const string RedirectUri = "https://login.microsoftonline.com/common/oauth2/nativeclient";
    private const string[] Scopes = { "https://your-domain.sharepoint.com/.default" };

    private static async Task<string> GetAccessTokenAsync()
    {
        IConfidentialClientApplication app = ConfidentialClientApplicationBuilder.Create(ClientId)
            .WithAuthority(new Uri($"https://login.microsoftonline.com/{TenantId}"))
            .Build();

        var result = await app.AcquireTokenForClient(Scopes).ExecuteAsync();
        return result.AccessToken;
    }

    public static async Task<string> GetSharePointDataAsync()
    {
        var accessToken = await GetAccessTokenAsync();
        using (var httpClient = new HttpClient())
        {
            httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
            var response = await httpClient.GetAsync("https://your-domain.sharepoint.com/_api/web/lists");
            return await response.Content.ReadAsStringAsync();
        }
    }
}