在固定时间从后台任务触发API

Question

在我的Windows Phone 8 App中，我需要在凌晨2点触发API。但是，据我在Windows Phone 8中分析，计划任务将仅每30分钟触发一次，并且无法设置计时器。任何人都可以建议我如何在Windows Phone 8中实现这一点。 请查看我目前为止尝试过的代码。

预定的任务OnInvoke方法。

   protected async override void OnInvoke(ScheduledTask task)
    {
        GeoLocationService gs = GeoLocationService.InstanceCreation();
        repository = new HeartBeatRepository();
        HeartBeatModel _hbmodel = new HeartBeatModel();
        _hbmodel.MBeatName = "Heartbeat_";
        _hbmodel.MDataRoaming = "";
        _hbmodel.MDeviceID = "";
        _hbmodel.MFullName = "";
        _hbmodel.MLatitude = await gs.getlatitude();
        _hbmodel.MLongitude =await gs.getlongitude();
        _hbmodel.MTimeStamp = "";
        string userID = Convert.ToString(StateManagement.Current.GetValue("UserID"));
        if (userID.Length != 0)
        {
           await repository.PutHearBeat(userID, _hbmodel);
        }

        var curtime = DateTime.Now;
        ScheduledActionService.LaunchForTest(task.Name, TimeSpan.FromMinutes(60 - curtime.Minute));

        NotifyComplete();
    }

激活API的类文件，我在这里检查时间是否为2.00 A.M。

  public class HeartBeatRepository
  {
    public async Task<string> PutHearBeat(string userId, HeartBeatModel _heartbeatmodel)
    {
        if (DateTime.Now.ToString("hh:mm:ss tt").Equals((DateTime.ParseExact("2.00", "hh:mm:ss tt", CultureInfo.CurrentCulture).ToString())))

        {
            var serviceProvider = new ServiceProvider(new HeartBeatHttpHandler(string.Format(Services.Services.PutHeartBeatData, userId)));
            var assetDetails = (string)await serviceProvider.PutData(_heartbeatmodel);  
            return assetDetails;            
        }
        return null;

    }
}