c# - 任务不返回 IsCompleted 状态

Question

以下代码有一个错误:result 不包含任何状态； IsCompleted、IsCanceled 和IsFaulted 总是错误的，但是我测试了Task 可以正常工作，哪里有问题？

var result = _dataService.SyncPoll(webApiPoll); 

if (result.IsCompleted)
{
    _logger.Info("Execute sync, poll was completed");
    poll.IsSynchronized = true;
    poll.ServerStatus = ServerStatus.Active;
    ctx.SaveChanges();
}

//////

public Task SyncPoll(PollDto poll)
{
    if (!_isAuthorized)
    {
        return null;
    }
    var client = new ApiClient(_baseApiUrl, _authToken);
    Task result = Task.Run(async () => await client.SyncPollWeb(poll));
    return result;
}

///////

public async Task<HttpResponseMessage> SyncPollWeb(PollDto poll)
{
    HttpResponseMessage resp;
    //System.Diagnostics.Debugger.Launch();
    using (var client = GetClient())
    {
        client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue(_authType, _accessToken);
        resp = await client.PostAsJsonAsync<PollDto>("api/poll", poll);
    }
    return resp;
}

Answer 1

你实际上做的是fire and forget 所以你不具备这样的原则

问题来自await你必须添加 await 才能恢复状态

  var result =  await _dataService.SyncPoll(webApiPoll); 

//这里

 Task result = await   client.SyncPollWeb(poll);