c# – 任务取消异常(ThrowForNonSuccess)

我已经在答案中更改了我的代码,但是现在我在尝试运行任务时收到了TaskCancelledExceptions.

public virtual async Task RunAsync(TaskWithProgress task)
{
    Show();
    TaskIsRunning();
    await SetCompletedHandler(TaskComplete());
    await SetCancelledHandler(TaskCancelled())
    await SetFaultedHandler(TaskFaulted());
    await task;
    Close();
}

但是以下代码没有.我有点卡住原因.

public virtual Task RunAsync(TaskWithProgress task)
{
    Show();
    TaskIsRunning();
    SetCompletedHandler(TaskComplete());
    SetCancelledHandler(TaskCancelled())
    SetFaultedHandler(TaskFaulted());
    return task;
}

调用代码基本上涉及以下内容：

await progressDialog.RunAsync(task);

编辑：

我不会在任何地方取消取消,所以我不明白为什么这会抛出异常.

三个SetXXXHandler()方法基本上执行以下具有不同延续状态的代码：

task.ContinueWith(_ => action(),CancellationToken.None,TaskContinuationOptions.OnlyOnCanceled,this.Scheduler);

堆栈跟踪在这里：

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at FugroDXExt.frmBaseProgressAsync.<RunAsync>d__7.MoveNext() in d:C#FugroDXExttrunkfrmBaseProgressAsync.cs:line 92
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at FCP.Forms.frmProcessing.<mnuApplyCenteredSmoothing_ItemClick>d__34.MoveNext() in d:C#FCPFCPFormsfrmProcessing.cs:line 578

Close()只是关闭表单.如果我删除该行,则会发生同样的事情.