c# - 使用 Task.ContinueWith 时并非所有代码路径都返回值

Question

所以我有这个函数，我在所有 if-else 中都有返回，但仍然出现编译错误:

not all code paths return a value

public async Task<bool> DeletePost(string update_id, string authId)
{
    if (Utility.NetworkStatus.HasInternetAccess)
    {
        await APIs.DeletePost.DeletePostAPI(update_id, authId).ContinueWith((t) =>
        {
            if (t.Status == TaskStatus.RanToCompletion)
            {
                if (t.Result != null)
                {
                    return t.Result.status == 200;
                }
                else
                {
                    return false;
                    //empty result, API failed
                    //not implemented
                }
            }
            else
            {
                return false;
                //task failed 
                //not implemented
            }
        });
    }
    else
    {
        return false;
        //no network
        //not implemented
    }
}

谁能告诉我我做错了什么？

Answer 1

是的。您不返回 DeletePostAPI 的延续结果:

public async Task<bool> DeletePost(string update_id, string authId)
{
    if (Utility.NetworkStatus.HasInternetAccess)
    {
        return await APIs.DeletePost.DeletePostAPI(update_id, authId).ContinueWith((t) =>
        {
            if (t.Status == TaskStatus.RanToCompletion)
            {
                if (t.Result != null)
                {
                    return t.Result.status == 200;
                }
                else
                {
                    return false;
                    //empty result, API failed
                    //not implemented
                }
            }
            else
            {
                return false;
                //task failed 
                //not implemented
            }
        });
    }
    else
    {
        return false;
        //no network
        //not implemented
    }
}