Question

以下代码按我的意愿运行，但会发出警告：

Warning 1 Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

是否有Task.Run()的替代方案可以用一种简洁的方式启动这个帖子？

/// <summary>
/// StartSubscriptionsAsync must be called if you want subscription change notifications.
/// This starts the subscription engine. We always create one subscription for
/// Home DisplayName to start (but ignore any updates).
/// </summary>
public async Task StartSubscriptionsAsync(){
    await _subscriptionClient.ConnectAsync(Host, Port);

    // Generates a compiler warning, but it is what we want
    Task.Run(() => ReadSubscriptionResponses());

    // We do a GetValue so we know we have a good connection
    SendRequest("sys://Home?f??" + "Name");

    if (FastMode) EnableFastMode();

    foreach (var subscription in _subscriptions) {
        SendSubscriptionRequest(subscription.Value);
    }
}

Answer 1

如果Task await await {}返回await并且Task task = Task.Run(() => ReadSubscriptionResponses());我迟迟未将其存储到{{1}}，则会触发警告。如果你想要发射冒险行为，你可以简单地存储任务，但绝不能{{1}}它：

{{1}}

Answer 2

如果您真的想要发射性行为，可以致电ThreadPool.QueueUserWorkItem()。

但是，请确保您知道如何处理该功能的错误。

Answer 3

另见Stephen Clearys answer关于即发即弃异步操作的一般问题。当您在非默认同步上下文（如WPF或ASP.NET）中运行时，他的async-void解决方案非常棒，因为任何异常都会自动发布回同步上下文，因此它们不会被观察到。< / p>

不会抛出警告的Task.Run的替代方案

3 个答案: