Nancy 路由 - return 回调值

Nancy route - return value on callback

我有一个远程控制的应用程序。该程序必须根据请求播放动画,并在完成时响应客户端。这是我现在的代码(它不能正常工作):

public void PlayAnimation(Action callback)
{
    DoubleAnimation fadeOut = new DoubleAnimation
    {
        //settings
    };
    fadeOut.Completed += (s, e) => callback();
    BeginAnimation(OpacityProperty, fadeOut);
}


Get["/playAnim/{id}"] = param =>
{
    MainWindow.PlayAnimation(() => {/* Need to call "return" statement here */});
    return "Ok"; // This is where the value is returned now.
    //The execution gets here before animation was completed.
};

我知道,Nancy 也支持 async-await 语法,但 DoubleAnimation 不支持(或者支持?)。那么,如何让 Nancy 在 动画播放后 做出响应?

正如您所说 - Nancy 支持异步方法,因此您可以在此处使用 TaskCompletionSource。您的代码的第二部分将如下所示:

Get["/playAnim/{id}"] = async param =>
{
    var completionSource = new TaskCompletionSource<bool>();
    MainWindow.PlayAnimation(() => { completionSource.SetResult(true); });

    await completionSource.Task;

    return "Ok"; 
};