Question

我正在开发一个应用程序，我想在SpeechSynthesizer.SpeakTextAsync正在运行之间暂停，然后从那里恢复。

await synthesizer.SpeakTextAsync(text);

var stop = true;

时停止阅读

Answer 1

有人在这里发布了一段时间，同时我刷新了页面，阅读了他的回答，看到了通知＆amp;再次刷新页面＆amp;答案消失了。但无论谁发布，他都是一个救生员。它引起了我的注意，我最终创造了这个。

    String text;  // your text to read out loud
    String[] parts = text.Split(' ');
    int max = parts.Length;
    int count = 0;

    private String makeSSML() {
        if (count == max) { 
            count= 0;
        }
        String s = "<speak version=\"1.0\" ";
        s += "xmlns=\"http://www.w3.org/2001/10/synthesis\" xml:lang=\"en-US\">";
        for (int i = count; i < max; i++)
        {
            s += parts[i];
            s += "<mark name=\"anything\"/>";
        }
        s += "<mark name=\"END\"/>";
        s += "</speak>";
        return s;
    }

    private void playIT(){
        synth = new SpeechSynthesizer();
        synth.BookmarkReached += synth_BookmarkReached;
        synth.SpeakSsmlAsync(makeSSML());
    }

    private void synth_BookmarkReached(object sender, SpeechBookmarkReachedEventArgs e)
    {
        count++;
        if (e.Bookmark == "END") {
            synth.Dispose();
        }
    }

    private void Pause_Click(object sender, RoutedEventArgs e)
    {
        synth.Dispose();
    }

谢谢你，你的答案给了我这个主意。

Answer 2

根据文档，当您调用CancellAll时，您将取消异步执行的任务。通过合同，这会导致OperationCancelledException被抛出。这意味着无论您何时调用SpeakTextAsync，SpeakSsmlAsync或SpeakSsmlFromUriAsync，都必须使用try / catch语句包围这些调用，以防止此异常被捕获。

示例：

private static SpeechSynthesizer synth; public async static Task<SpeechSynthesizer> SpeechSynth(string dataToSpeak) { synth = new SpeechSynthesizer(); IEnumerable<VoiceInformation> englishVoices = from voice in InstalledVoices.All where voice.Language == "en-US" && voice.Gender.Equals(VoiceGender.Female) select voice; if (englishVoices.Count() > 0) { synth.SetVoice(englishVoices.ElementAt(0)); } await synth.SpeakTextAsync(dataToSpeak); return synth; } public static void CancelSpeech() { synth.CancelAll(); }

现在拨打所需的SpeechSynth("Some Data to Speak")，无论何时取消，只需拨打CancelSpeech()即可。

完成了！享受... ...！

Windows Phone 8 SpeechSynthesizer暂停

2 个答案: