BackgroundTaskRegistration-值不在预期范围内

Question

我的Windows8应用程序有一个持续存在的问题。

private void CheckTaskRegistration()
{
    foreach (var task in BackgroundTaskRegistration.AllTasks)
    {
        Debug.WriteLine(task);
        if (task.Value.Name == "CheckConTask")
        {
            isTaskRegistered = true;
            break;
        }
    }

    if (isTaskRegistered)
    {
        Debug.WriteLine("debug1");
    }
    else if (!isTaskRegistered)
    {
        BackgroundTaskBuilder btb = new BackgroundTaskBuilder();
        btb.Name = "CheckConTask";
        btb.TaskEntryPoint = "Btasks.CheckConTask";

       BackgroundTaskRegistration task = btb.Register();
       Debug.WriteLine("debug2");
    }
}

Answer 1

您的任务未设置触发器：

TimeTrigger trigger = new TimeTrigger(15, false);
BackgroundTaskBuilder builder = new BackgroundTaskBuilder();
builder.TaskEntryPoint = typeof(SubTask).FullName;
builder.SetTrigger(trigger);
builder.Register();

确保任务注册到Package.AppXManifest中的正确触发器：

<Extension Category="windows.backgroundTasks" EntryPoint="xxx.SubTask">
      <BackgroundTasks>
        <Task Type="timer"/>
      </BackgroundTasks>
    </Extension>