C# SSO for Microsoft Graph调用UWP for Sharepoint Online不返回任何令牌

所以我一直在为这个UWP应用程序工作。我在我的开发者网站上运行了一个测试程序，并使它运行得很好。我重新创建了UWP应用程序，以便在我公司的平台上访问它，我遇到了一个障碍。当我试图提交数据时，我得到一个MsalUIRequiredException错误

{Microsoft.Identity.Client.MsalUiRequiredException: Null user was passed in AcquiretokenSilent API. Pass in a user object or call acquireToken authenticate.
   at Microsoft.Identity.Client.Internal.Requests.SilentRequest..ctor(AuthenticationRequestParameters authenticationRequestParameters, Boolean forceRefresh)
   at Microsoft.Identity.Client.ClientApplicationBase.<AcquireTokenSilentCommonAsync>d__34.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Identity.Client.ClientApplicationBase.<AcquireTokenSilentAsync>d__31.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at AshburnGeneratorApp.Authentication.<AquireTokenAsync>d__0.MoveNext()
    ErrorCode: user_null
    StatusCode: 0
    Claims: }

其中“companyname”是我实际的公司名称

如果我在图形资源管理器上运行GET，该链接工作得很好。所以我知道我错过了一些简单的东西

以下代码启动身份验证：

private async void SubmitButton_Click(object sender, RoutedEventArgs e)
        {
            var (authResult, message) = await Authentication.AquireTokenAsync();
            ResultText.Text = message;

            if (authResult != null)
            {
                await SubmitDataWithTokenAsync(submiturl, authResult.AccessToken);
            }
        }

这将调用此代码：

public static async Task<(AuthenticationResult authResult, string message)> AquireTokenAsync()
        {
            AuthenticationResult authResult = null;
            string message = String.Empty;
            string[] scopes = App.scopes;

            try
            {
                authResult = await App.PublicClientApp.AcquireTokenSilentAsync(scopes, App.PublicClientApp.Users.FirstOrDefault());
            }
            catch (MsalUiRequiredException ex)
            {
                // A MsalUiRequiredException happened on AcquireTokenSilentAsync. This indicates you need to call AcquireTokenAsync to acquire a token
                System.Diagnostics.Debug.WriteLine($"MsalUiRequiredException: {ex.Message}");

                try
                {
                    authResult = await App.PublicClientApp.AcquireTokenAsync(scopes);
                }
                catch (MsalException msalex)
                {
                    message = $"Error Acquiring Token:{System.Environment.NewLine}{msalex}";
                }
            }
            catch (Exception ex)
            {
                message = $"Error Acquiring Token Silently:{System.Environment.NewLine}{ex}";
            }
            return (authResult, message);
        }

最后一段代码

private static string ClientId = "87f68831-d1ea-493c-8b94-e61fcd1c4a08";

public static PublicClientApplication PublicClientApp { get; } = new PublicClientApplication(ClientId);

---

我知道这很简单。我没有为v2.0注册应用程序。一旦我这么做了，一切都很顺利。

您成功获得访问令牌了吗？你能试着创建一个简单的示例来帮助我看到你在我这边的问题吗？请注意，在代码示例中，请注意您的隐私。您也可以参考代码。我看到，即使它在我的开发中的另一个实例上工作，但在这个实例中却不能正常工作。我正在研究代码以找出答案。我会让你知道的。

public static async Task<(AuthenticationResult authResult, string message)> AquireTokenAsync()
        {
            AuthenticationResult authResult = null;
            string message = String.Empty;
            string[] scopes = App.scopes;

            try
            {
                authResult = await App.PublicClientApp.AcquireTokenSilentAsync(scopes, App.PublicClientApp.Users.FirstOrDefault());
            }
            catch (MsalUiRequiredException ex)
            {
                // A MsalUiRequiredException happened on AcquireTokenSilentAsync. This indicates you need to call AcquireTokenAsync to acquire a token
                System.Diagnostics.Debug.WriteLine($"MsalUiRequiredException: {ex.Message}");

                try
                {
                    authResult = await App.PublicClientApp.AcquireTokenAsync(scopes);
                }
                catch (MsalException msalex)
                {
                    message = $"Error Acquiring Token:{System.Environment.NewLine}{msalex}";
                }
            }
            catch (Exception ex)
            {
                message = $"Error Acquiring Token Silently:{System.Environment.NewLine}{ex}";
            }
            return (authResult, message);
        }

public static string[] scopes = new string[] { "user.ReadWrite", "Sites.ReadWrite.All" };

private static string ClientId = "87f68831-d1ea-493c-8b94-e61fcd1c4a08";

public static PublicClientApplication PublicClientApp { get; } = new PublicClientApplication(ClientId);