如何解决Office 365连接错误和SharePoint Online凭据

Question

目前，我正在尝试通过我的应用程序连接到Office 365 SharePoint，并使用以下方法，以便在连接列表，文档上传等连接后可以执行进一步

        static string siteUrl = "https://<<Site URL>>";
        static string userName = "xxxxxxxx";
        static string password = "xxxxxxxxx";

        public async static void Uploadfiles()
        {
            try
            {
                ClientContext ctx = new ClientContext(siteUrl);
                SecureString secureString = new SecureString();
                password.ToList().ForEach(secureString.AppendChar);
                ctx.Credentials = new SharePointOnlineCredentials(userName, secureString);
                Web web = ctx.Web;
                Site site = ctx.Site;
                ctx.Load(site);
                ctx.ExecuteQuery();
                Console.WriteLine(site.Url.ToString());
            }
            catch (Exception ex)
            {
                System.Console.WriteLine("Exception occurred : " + ex.Message);
                System.Console.ReadLine();
            }
        }

操作

Cannot contact web site 'https://<<Site Url>>/' or the web site does not support SharePoint Online credentials. The response status code is 'Unauthorized'. The response headers are 'X-SharePointHealthScore=1, X-MSDAVEXT_Error=917656; Access+denied.+Before+opening+files+in+this+location%2c+you+must+first+browse+to+the+web+site+and+select+the+option+to+login+automatically., SPRequestGuid=0e6f41a0-90f3-1000-2182-78f5074383d4, request-id=0e6f41a0-90f3-1000-2182-78f5074383d4, MS-CV=oEFvDvOQABAhgnj1B0OD1A.0, Strict-Transport-Security=max-age=31536000, SPRequestDuration=15, SPIisLatency=0, MicrosoftSharePointTeamServices=16.0.0.22504, X-Content-Type-Options=nosniff, X-MS-InvokeApp=1; RequireReadOnly, X-Cache=CONFIG_NOCACHE, X-MSEdge-Ref=Ref A: 45D6DA1299E1407E9FD61C019494216D Ref B: BL2EDGE2116 Ref C: 2022-05-27T09:06:08Z, Content-Length=0, Content-Type=text/plain; charset=utf-8, Date=Fri, 27 May 2022 09:06:08 GMT, P3P=CP="ALL IND DSP COR ADM CONo CUR CUSo IVAo IVDo PSA PSD TAI TELo OUR SAMo CNT COM INT NAV ONL PHY PRE PUR UNI", X-Powered-By=ASP.NET'.

的 站点层面的任何东西，否则我的方法都缺少任何东西。

Answer 1

SharePointonLinlineCredentials使用遗留身份验证，默认情况下，这些验证已被禁用在租户上。如果您有租户管理权，则可以在不关心安全问题的情况下启用它。
否则，您需要使用OAuth代币身份验证，查看MSAL或PNP Framework库（Authentication Manager类）。