Question

我有一个UWP应用程序，它在一个回调中请求扩展执行，该回调在下面的操作开始后被触发：

private async void HandleOnSyncStart(ISyncStart msg)
{
    // request extended execution
    ExtendedExecutionResult result = await 
      Utils.ExtendedExecutionHelper.RequestExtendedExecutionSessionAsync();
}

，但我收到以下错误

The group or resource is not in the correct state to perform the 
 requested operation. (Exception from HRESULT: 0x8007139F)

在下面显示的 RequestExtendedExecutionSessionAsync（）方法的返回调用中抛出错误。这是堆栈跟踪：

   at Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionSession..ctor()
   at MyProject.UWP.Utils.ExtendedExecutionHelper.<RequestExtendedExecutionSessionAsync>d__0.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 MyProject.UWP.MainPage.<HandleOnSyncStart>d__65.MoveNext()

在ExtendedExecutionHelper静态类的RequestExtendedExecutionAsync（）方法中请求扩展执行会话，如下所示：

    public static async Task<ExtendedExecutionResult> RequestExtendedExecutionSessionAsync()
    {
        ClearExtendedExecutionSession();  //first clear if any session granted

        var newSession = new ExtendedExecutionSession();
        newSession.Reason = ExtendedExecutionReason.Unspecified;
        newSession.Description = "Extended Execution Request";
        newSession.Revoked += OnExtendedExecutionSessionRevoked;

        ExtendedExecutionResult result = await newSession.RequestExtensionAsync();
        switch (result)
        {
            case ExtendedExecutionResult.Allowed:
                Debug.WriteLine(string.Format("ExtendedExecutionHelper: ExtendedExecution allowed."));
                session = newSession;
                break;
            case ExtendedExecutionResult.Denied:
                Debug.WriteLine(string.Format("ExtendedExecutionHelper: ExtendedExecution denied."));
                newSession.Dispose();
                break;
        }

        return result; //ERROR
    }

Answer 1

在ExtendedExecutionSession类的构造函数中抛出此异常。

堆栈跟踪：在Windows.ApplicationModel.ExtendedExecution.ExtendedExecutionSession..ctor（）

此异常可能由

引起

任何时候都只能请求一个ExtendedExecutionSession;当一个当前处于活动状态时尝试创建另一个会话将导致从ExtendedExecutionSession构造函数抛出异常。

所以看起来ClearExtendedExecutionSession无法处理以前运行的会话。如果您的代码是从this page采用的......也许代码有一些微妙的错误，如该页面上的一些评论所示。

您可以展示如何处理之前的运行会话。

UWP ExtendedExecution - 请求扩展执行时出错

1 个答案: