C# “使用网络API需要在应用程序清单中定义ID_CAP_网络功能。”

我正在编写一个Windows Phone 8.1 WINRT应用程序

我正在使用WebAuthenticationBroker通过google登录+

 public async void ContinueWebAuthentication(WebAuthenticationBrokerContinuationEventArgs args)
        {
            WebAuthenticationResult result = args.WebAuthenticationResult;

            switch (result.ResponseStatus)
            {
                case WebAuthenticationStatus.Success:
                    {  
                        var response = result.ResponseData;                        
                        string responseString = result.ResponseData.ToString();
                        _authorizationCode = responseString.Substring(response.IndexOf("=") + 1);                        

                        await getAccessToken();
                        break;
                    }
                case WebAuthenticationStatus.UserCancel:
                    {

                        break;
                    }
                default:
                case WebAuthenticationStatus.ErrorHttp:
                    {               
                    break;

                    }

            }

        }


         private async Task getAccessToken()
        {

            string oauthUrl = "https://accounts.google.com/o/oauth2/token";

            HttpClient theAuthClient = new HttpClient();

              HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, oauthUrl);

                 // default case, we have an authentication code, want a refresh/access token            
                 string content = "code=" + _authorizationCode + "&" +
                     "client_id=" + singletonInstance.GoogleClientID + "&" +
                     "client_secret=" + singletonInstance.GoogleClientSecret + "&" +
                     "redirect_uri=" + singletonInstance.GoogleCallbackUrl + "&" +
                     "grant_type=authorization_code";

                 request.Method = HttpMethod.Post;

                 request.Content = new StreamContent(new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(content)));
                 request.Content.Headers.Add("Content-Type", "application/x-www-form-urlencoded");

                 try
                 {
                     HttpResponseMessage response = await theAuthClient.SendAsync(request);
                     parseAccessToken(response);
                 }
                 catch (HttpRequestException)
                 {

                 }


        }

但是：

给我一个错误：

{System.UnauthorizedAccessException:访问被拒绝。来自的异常 HRESULT:0x80070005 E_ACCESSDENIED}

使用网络API需要ID_CAP_网络功能 在应用程序清单中定义

在MS.Internal.Modern.ClientHttpWebRequestCreator.CreateUri uri\r\n位于System.Net.WebRequest.CreateUri requestUri，布尔值 schemeOnly\r\n位于System.Net.WebRequest.CreateUri requestUri\r\n 在 System.Net.Http.HttpClientHandler.CreateAndPrepareWebRequestHttpRequestMessage 请求\r\n在 System.Net.Http.HttpClientHandler.SendAsyncHttpRequestMessage 请求，CancellationToken CancellationToken\r\n--堆栈结束 从引发异常的上一个位置的跟踪--\r\n System.Runtime.CompilerServices.TaskWaiter.ThrowForNonSuccessTask 任务\r\n位于 System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotificationTask 任务\r\n位于 System.Runtime.CompilerServices.TaskWaiter`1.GetResult\r\n位于 Merakyahoga.com.Pages.MedicalVertical.Common.MedicalGooglePlusLoginPage.d\u 11.MoveNext\r\n-- 来自引发异常的上一个位置的堆栈结束跟踪 --\r\n位于System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccessTask 任务\r\n位于 System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotificationTask 任务\r\n位于 System.Runtime.CompilerServices.TaskWaiter.GetResult\r\n位于 Merakyahoga.com.Pages.MedicalVertical.Common.MedicalGooglePlusLoginPage.d\u b.MoveNext\r\n-- 来自引发异常的上一个位置的堆栈结束跟踪 --\r\n位于System.Runtime.CompilerServices.AsyncMethodBuilderCore.b\u 3Object 状态\r\n位于 System.Threading.WinRTSynchronizationContext.Invoker.InvokeCore

我已经从Package.appxmanifest上的功能启用了Internet

实际上，它会转到Continuationmanager.cs：

case ActivationKind.WebAuthenticationBrokerContinuation:
                var wabPage = rootFrame.Content as IWebAuthenticationContinuable;
                if (wabPage != null)
                {
                    wabPage.ContinueWebAuthentication(args as WebAuthenticationBrokerContinuationEventArgs);
                }
                break;

然后转到app.xaml.cs：

  protected override void OnActivated(IActivatedEventArgs args)
            {
                base.OnActivated(args);

                continuationManager = new ContinuationManager();

                var continuationEventArgs = args as IContinuationActivatedEventArgs;
                if (continuationEventArgs == null)
                    return;

                var frame = Window.Current.Content as Frame;
                if (frame != null)
                {
                    // Call ContinuationManager to handle continuation activation
                    continuationManager.Continue(continuationEventArgs, frame);
                }
            }

---

并且在此崩溃。

您还需要将ID\u CAP\u网络添加到Properties\WMAppManifest.xml。

实际问题是我使用的是System.Net中的HTTPClient 我现在将其替换为Windows.Web HTTPClient

  protected override void OnActivated(IActivatedEventArgs args)
            {
                base.OnActivated(args);

                continuationManager = new ContinuationManager();

                var continuationEventArgs = args as IContinuationActivatedEventArgs;
                if (continuationEventArgs == null)
                    return;

                var frame = Window.Current.Content as Frame;
                if (frame != null)
                {
                    // Call ContinuationManager to handle continuation activation
                    continuationManager.Continue(continuationEventArgs, frame);
                }
            }