如何创建 GraphServiceClient？答案

【问题标题】：How to create GraphServiceClient?如何创建 GraphServiceClient？
【发布时间】：2021-03-09 20:46:09
【问题描述】：

我正在使用 Microsoft Graph API 开发 Windows 窗体应用程序。有谁知道如何获取访问令牌以及如何创建 GraphServiceClient？

【问题讨论】：

标签： microsoft-graph-api graphserviceclient

【解决方案1】：

private async Task<string> GetAccessToken()
        {
            IConfidentialClientApplication app = ConfidentialClientApplicationBuilder.Create(APP_ID)
              .WithClientSecret(APP_SECRET)
              .WithAuthority($"https://login.microsoftonline.com/{TENANT_ID}")
              .WithRedirectUri("https://localhost")
              .Build();

            string[] scopes = new string[] { "https://graph.microsoft.com/.default" };

            var result = await app.AcquireTokenForClient(scopes).ExecuteAsync();

            return result.AccessToken;
        }

private GraphServiceClient GetGraphClient()
        {
            var graphClient = new GraphServiceClient(new DelegateAuthenticationProvider((requestMessage) => {
                // get an access token for Graph
                var accessToken = GetAccessToken().Result;

                requestMessage
                    .Headers
                    .Authorization = new AuthenticationHeaderValue("bearer", accessToken);

                return Task.FromResult(0);
            }));

            return graphClient;
        }

【讨论】：