在 .net 完整框架中构建具有委托访问权限的 Microsoft Graph答案

【问题标题】：Constructing Microsoft Graph with delegate access in .net full framework在 .net 完整框架中构建具有委托访问权限的 Microsoft Graph
【发布时间】：2020-10-26 16:27:01
【问题描述】：

我正在尝试在 .net 4.5 框架中成功构建具有委托权限的图形客户端。我确实尝试了我在互联网上找到的所有方法，但所有方法都不起作用。我在 azure ad 中注册了我的应用程序并具有委托权限，但构建它时没有任何运气。这是我尝试过的最新版本：

    //private string[] _scopes = new string[] { "https://graph.microsoft.com/.default" };
    //private string[] _scopes = new string[] { "https://graph.microsoft.com/User.ReadWrite.All" };
    //private readonly string[] _scopes = new string[] { "User.Read" };
    private readonly string[] _scopes = new string[] { "User.Read.All" };
 
    public GraphServiceClient GetAuthenticatedGraphClient(ClaimsIdentity userIdentity) =>
        new GraphServiceClient(new DelegateAuthenticationProvider(
            async requestMessage =>
            {

                // Passing tenant ID to the sample auth provider to use as a cache key
                var accessToken = await _authProvider.GetUserAccessTokenAsync();

                // Append the access token to the request
                requestMessage.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);


            }));
}

    public async Task<string> GetUserAccessTokenAsync()
    {

        try
        {
         
           var result = await _app.AcquireTokenForClient(_scopes)
            .ExecuteAsync();
            return result.AccessToken;
        }

        // Unable to retrieve the access token silently.
        catch (Exception ex)
        {
            throw new ServiceException(new Error
            {
                Code = GraphErrorCode.AuthenticationFailure.ToString(),
                Message = "Caller needs to authenticate. Unable to retrieve the access token silently."
            });
        }
    }

我能否获得完整的代码片段来正确构建 Microsoft 图形客户端以获得完整框架 Web 应用程序的委托权限？

【问题讨论】：

标签： c# .net graph delegates