Windows Phone8中实现文本发音（Text to speech）

2023-06-15 12:14:55

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编辑和运行Windows Phone应用是件很容易的事情，你只需在微软网站获取一个免费的工具包，在AppHub注册后，并跟着入门教程学习就可以了。

XAML是我的惯用格式。. WP7开发者也许能注意到应用程序标题和页名不再是默认的硬编码，而是通过通过应用的共享资源来实现。通过这种方式，你不必再每次再所有页中设置应用名称。

<phone:PhoneApplicationPage    x:Class="TextToSpeechDemo.MainPage"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"    mc:Ignorable="d"    FontFamily="{StaticResource PhoneFontFamilyNormal}"    FontSize="{StaticResource PhoneFontSizeNormal}"    Foreground="{StaticResource PhoneForegroundBrush}"    SupportedOrientations="Portrait" Orientation="Portrait"    shell:SystemTray.IsVisible="True">    <!--LayoutRoot is the root grid where all page content is placed-->    <Grid x:Name="LayoutRoot" Background="Transparent">        <Grid.RowDefinitions>            <RowDefinition Height="Auto"/>            <RowDefinition Height="*"/>        </Grid.RowDefinitions>        <!--TitlePanel contains the name of the application and page title-->        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">            <TextBlock Text="{Binding Path=LocalizedResources.ApplicationTitle, Source={StaticResource LocalizedStrings}}" Style="{StaticResource PhoneTextNormalStyle}"/>            <TextBlock Text="{Binding Path=LocalizedResources.PageTitle, Source={StaticResource LocalizedStrings}}" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>        </StackPanel>        <!--ContentPanel - place additional content here-->        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">            <StackPanel>                <ScrollViewer Height="200">                    <ComboBox HorizontalAlignment="Left" Width="456" Name="voicesComboBox" DisplayMemberPath="Name" />                </ScrollViewer>                <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">                    <RadioButton Content="Male" IsChecked="true" Name="MaleRadioButton"/>                    <RadioButton Content="Female"/>                </StackPanel>                <TextBox HorizontalAlignment="Left" Height="230" TextWrapping="Wrap" Width="456" Text="I may be a sorry case, but I don't write jokes in base 13." Name="inputTextBox"/>                <Button Content="Speak to me" HorizontalAlignment="Left" Width="456" Click="SpeakToMe_Click"/>            </StackPanel>        </Grid>    </Grid></phone:PhoneApplicationPage>

下面是.xaml主页的代码文件。其内容大部分借用自WP8 SDK的文档。我加入了一些错误检测的内容以及性别选择和发音语言选择的功能。

using System;using System.Linq;using System.Windows;using Microsoft.Phone.Controls;using Windows.Phone.Speech.Synthesis; namespace TextToSpeechDemo{    public partial class MainPage : PhoneApplicationPage    {        SpeechSynthesizer synth;        // Constructor        public MainPage()        {            InitializeComponent();            voicesComboBox.ItemsSource = new MyLocals().Items();        }         private async void SpeakToMe_Click(object sender, RoutedEventArgs e)        {            if (voicesComboBox.SelectedIndex == -1)            {                MessageBox.Show("Please select a language.");            }            else            {                if (string.IsNullOrEmpty(inputTextBox.Text))                {                    MessageBox.Show("Please enter some text.");                }                else                {                    try                    {                        // Initialize the SpeechSynthesizer object.                        synth = new SpeechSynthesizer();                         var myLocal = (MyLocale)voicesComboBox.SelectedItem;                         // Query for a voice. Results rdered by Gender to ensure the order always goes Female then Male.                        var voices = (from voice in InstalledVoices.All                                      where voice.Language == myLocal.Lcid                                      select voice).OrderByDescending(v => v.Gender);                         // gender: 0 = Female, 1 = Male. Corresponds to the index of the above results.                        int gender = 0;                        if (MaleRadioButton.IsChecked == true) gender = 1; else gender = 0;                         // Set the voice as identified by the query.                        synth.SetVoice(voices.ElementAt(gender));                         // Speak                        await synth.SpeakTextAsync(inputTextBox.Text);                    }                    catch (Exception ex)                    {                        MessageBox.Show(ex.Message);                    }                }            }        }    }}

下面两个类是用来填充发音语言的下拉列表框和检测安装的声音。里面包含30项（15种语言 x 2种声音)。通过LINQ查询可以获取所需的声音信息对象，这里可以给出12种语言，而另外3种仍需深入了解。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks; namespace TextToSpeechDemo{    class MyLocale    {        public MyLocale(string name, string lcid)        {            _name = name;            _lcid = lcid;        }         private string _name;        public string Name        {            get { return _name; }            set { _name = value; }        }         private string _lcid;        public string Lcid        {            get { return _lcid; }            set { _lcid = value; }        }    }     class MyLocals    {        private IList<MyLocale> _myLocals;         public MyLocals()        {            _myLocals = new List<MyLocale>();             _myLocals.Add(new MyLocale("Chinese Simplified (PRC)", "zh-CN"));            _myLocals.Add(new MyLocale("Chinese Traditional (Taiwan)", "zh-TW"));            _myLocals.Add(new MyLocale("English (United States)", "en-US"));            _myLocals.Add(new MyLocale("English (United Kingdom)", "en-GB"));            _myLocals.Add(new MyLocale("French (France)", "fr-FR"));            _myLocals.Add(new MyLocale("German (Germany)", "de-DE"));            _myLocals.Add(new MyLocale("Italian (Italy)", "it-IT"));            _myLocals.Add(new MyLocale("Japanese (Japan)", "ja-JP"));            _myLocals.Add(new MyLocale("Polish (Poland)", "pl-PL"));            _myLocals.Add(new MyLocale("Portuguese (Brazil)", "pt-BR"));            _myLocals.Add(new MyLocale("Russian (Russia)", "ru-RU"));            _myLocals.Add(new MyLocale("Spanish (Spain)", "es-ES"));        }         public IEnumerable<MyLocale> Items()        {            return (IEnumerable<MyLocale>)_myLocals;        }    }}

接下来的事情是设置 ID_CAP_SPEECH_RECOGNITION功能，否则将抛出异常。