SAPI或(文本到语音)…C#的同步问题 [英] Synchronization Problem for SAPI or (text to speech ) … C#

问题描述

我正在研究一个会讲浏览网页内容的项目.浏览器由我使用WebControl制作.我正在将SAPI用于语音引擎.我想在阅读SpVoice.speak低谷时突出显示网页中的这一行.但是问题是，如果我以异步方式使用此语音方法，则仅将网页的最后一行突出显示，因为循环不会等待语音完成.因此，它发生得如此之快，以至于只有最后一行显示为高亮.Highlight方法正在使用参考Microsoft mshtml.代码:

SpeechLib.SpVoice sound_object = new SpeechLib.SpVoice();
bool highlight(string senten)
    {
        if (senten != null)
        {
            IHTMLDocument2 doc = (IHTMLDocument2)GetCurrentBrowser().Document.DomDocument;
            IHTMLSelectionObject sel = (IHTMLSelectionObject)doc.selection;
            IHTMLTxtRange rng = (IHTMLTxtRange)sel.createRange();
            rng.collapse(false);
            if (rng.findText(senten, 1000000, 0))
            {
                rng.select();
                return true;
            }
            else
            {
                return false;
            }

        }
        else
        { return false; }

    }

private void Read_ButtonSpkBAR_Click(object sender, EventArgs e) { //call for getting sourceCode gettingSourceCode();

        if (highlightToolStripMenuItem.Checked == true)
        {

            if (PAUSE)
            {
                sound_object.Resume();
                PAUSE = false;
            }
            else
            {
                sound_object.Rate = tempoRate;
                sound_object.Volume = volume;


                string[] splitSentences = Regex.Split(SourceCode, @"(?<=[''""A-Za-z0-9][\.\!\?\u2424])\s+(?=[A-Z])");



                for (int i = 0; i < splitSentences.Length; i++)
                {


                    highlight(splitSentences[i]);
                    //MessageBox.Show(splitSentences[i]);

                    sound_object.Speak(splitSentences[i],SpeechLib.SpeechVoiceSpeakFlags.SVSFlagsAsync);




                }
            }
        }

现在，如果我以同步方式调用sound_object.speak()，即sound_object.Speak(splitSentences [i]);然后循环等待声音完成，但是我不知道为什么它没有显示突出显示的行.该软件在讲话时被挂起.这意味着WebBrowser在讲话时不执行任何操作，但那时的讲话程序运行正常.

为了检查突出显示，我在循环内放置了一个消息框，看到如果循环等待按下消息框的确定"按钮，则行会突出显示.但这根本不是推确定"的好主意.每行的按钮.因此，任何人都可以帮助我，这是什么问题，以及如何以有效的方式使用SAPI或任何其他语音引擎，这样我就可以在不使浏览器挂起的情况下完全阅读并突出显示内容. div class ="h2_lin">解决方案

放置

 Application.DoEvents()

吗?

I''m working on a project which will speak the content of browsed web page.Browser is made by me using WebControl. I''m using SAPI for speech engine. I wanted to highlight the line in web page while reading that trough SpVoice.speak. But the problem is that if I use this speak method in Asynchronous way,then only last line of the web page getting highlighted,because the loop doesn''t wait for the voice to complete. Thus it happens so fast that only last line is shown as highlighted.Highlight method is using a reference Microsoft mshtml. CODE:

SpeechLib.SpVoice sound_object = new SpeechLib.SpVoice();
bool highlight(string senten)
    {
        if (senten != null)
        {
            IHTMLDocument2 doc = (IHTMLDocument2)GetCurrentBrowser().Document.DomDocument;
            IHTMLSelectionObject sel = (IHTMLSelectionObject)doc.selection;
            IHTMLTxtRange rng = (IHTMLTxtRange)sel.createRange();
            rng.collapse(false);
            if (rng.findText(senten, 1000000, 0))
            {
                rng.select();
                return true;
            }
            else
            {
                return false;
            }

        }
        else
        { return false; }

    }

private void Read_ButtonSpkBAR_Click(object sender, EventArgs e) { //call for getting sourceCode gettingSourceCode();

        if (highlightToolStripMenuItem.Checked == true)
        {

            if (PAUSE)
            {
                sound_object.Resume();
                PAUSE = false;
            }
            else
            {
                sound_object.Rate = tempoRate;
                sound_object.Volume = volume;


                string[] splitSentences = Regex.Split(SourceCode, @"(?<=[''""A-Za-z0-9][\.\!\?\u2424])\s+(?=[A-Z])");



                for (int i = 0; i < splitSentences.Length; i++)
                {


                    highlight(splitSentences[i]);
                    //MessageBox.Show(splitSentences[i]);

                    sound_object.Speak(splitSentences[i],SpeechLib.SpeechVoiceSpeakFlags.SVSFlagsAsync);




                }
            }
        }

Now if I call the sound_object.speak() in a Synchronize way which is sound_object.Speak(splitSentences[i]); then the loop wait for the voice to complete,but I don''t know why it didn''t show highlighted line. The software get hanged while speaking.That means WebBrowser doesn''t do anything while speaking,but the speaking procedure works fine at that time.

For checking the highlight I put a messagebox inside of loop and seen that the lines get highlighted if the loop wait for the "OK" button to be pushed of the messagebox.But this isn''t a good idea at all to push "OK" button for each line. So can anyone please help me that what is the problem and how can I use the SAPI or any other speech engine in a efficient way, so that I can read and highlight altogether without getting the browser hanged........

解决方案

Placing an

Application.DoEvents()

?

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