Question

我是异步编程的新手，我想知道你是否可以伪造c＃异步方法使其像同步一样工作？或者，如果您可以在执行另一种方法之前让它等待它完成？

就我而言：

await Speak("Do you want me to call 123 ?");
   if (isComplete)
       {
          PhoneCallTask phone = new PhoneCallTask();
           phone.PhoneNumber = "123";
            phone.Show();

        } 
await Speak("blabla");

isComplete是全局布尔值..

这是Speak方法：

private async Task Speak(string text)
    {
    SpeechSynthesizer synth = new SpeechSynthesizer();
    await synth.SpeakTextAsync(text);
    isComplete = true;
    }

它说的是第一个文本，而不是显示对话框..在对话框崩溃后它崩溃了..

Answer 1

您可以使用await关键字

请参阅以下来自MSDN

的示例

// Declare the SpeechSynthesizer object at the class level.
SpeechSynthesizer synth;

// Handle the button click event.
private async void SpeakFrench_Click_1(object sender, RoutedEventArgs e)
{
  // Initialize the SpeechSynthesizer object.
  synth = new SpeechSynthesizer();

  // Query for a voice that speaks French.
  IEnumerable<VoiceInformation> frenchVoices = from voice in InstalledVoices.All
                     where voice.Language == "fr-FR"
                     select voice;

  // Set the voice as identified by the query.
  synth.SetVoice(frenchVoices.ElementAt(0));

  // Count in French.
  await synth.SpeakTextAsync("un, deux, trois, quatre");
}

Windows Phone 8使异步方法的行为与其同步一样

1 个答案: