Question

当我尝试检索结果时，我遇到了阻止任务的问题。

我有以下要同步执行的代码（这就是为什么我要查找结果）

我会忽略每次调用必须进行的原因（传统软件需要通过不同的层进行多次调用）

在启动PostCreateProfile中进行最终调用的任务后，调用似乎崩溃了，我可以看到这个请求永远不会比这更进一步。

if (CreateProfile(demographics).Result) // Task blocks here
{
    //dothing
}

private async Task<bool> CreateProfile(Demographics demographics)
{
    ProfileService profileService = new ProfileService();

    CreateProfileBindingModel createProfileBindingModel = this.CreateProfileModel(demographics);

    return await profileService.Create(createProfileBindingModel);
}

public async Task<bool> Create(CreateProfileBindingModel model)
{
    HttpResponseMessage response = await profileServiceRequest.PostCreateProfile(rootURL, model);

    return response.IsSuccessStatusCode;
}

public Task<HttpResponseMessage> PostCreateProfile(string url, CreateProfileBindingModel model)
{
    HttpContent contents = SerialiseModelData(model);
    var resultTask = client.PostAsync(url, contents);

    return resultTask;
}

如果我要将CreateProfile更改为异步void，请求将到达其目的地：

private async void CreateProfile(AppointmentController controller)
{
    ProfileService profileService = new ProfileService();

    CreateProfileBindingModel createProfileBindingModel = this.CreateProfileModel(controller);

    await profileService.Create(createProfileBindingModel);
}

但是我不能从这里返回我想要使用的bool。谁能指出我做错了什么？

Answer 1

You should never call .Result on a async/await chain

调用CreateProfile(demographics)的任何代码都需要异步，以便它可以执行

if (await CreateProfile(demographics))
{
    //dothing
}

另外，如果你真的可以把.ConfigureAwait(false)放在逻辑上可能的地方。

if (await CreateProfile(demographics).ConfigureAwait(false)) // depending on what dothing is you may not want it here.
{
    //dothing
}

private async Task<bool> CreateProfile(Demographics demographics)
{
    ProfileService profileService = new ProfileService();

    CreateProfileBindingModel createProfileBindingModel = this.CreateProfileModel(demographics);

    return await profileService.Create(createProfileBindingModel).ConfigureAwait(false);
}

public async Task<bool> Create(CreateProfileBindingModel model)
{
    HttpResponseMessage response = await profileServiceRequest.PostCreateProfile(rootURL, model).ConfigureAwait(false);

    return response.IsSuccessStatusCode;
}

public Task<HttpResponseMessage> PostCreateProfile(string url, CreateProfileBindingModel model)
{
    HttpContent contents = SerialiseModelData(model);
    var resultTask = client.PostAsync(url, contents);

    return resultTask;
}

异步任务的结果是阻止

1 个答案: