In WPF Microsoft provide a new API that allows developers to build speech enabled applications. Speech synthesis is a feature that generates spoken audio based on text you supply. In this article I am trying to show how to use new API in application, simply add a reference to System.Speech and include the following code to your project.

Code .XAML
<Window x:Class="ReportWPF.Window5"
        Title="Window5" Height="300" Width="594">
        <Label Content="  Example Of Speech Synthesis in WPF" Height="43" HorizontalAlignment="Left" Margin="73,15,0,0" Name="label1" VerticalAlignment="Top" Width="431" FontFamily="Cambria" FontWeight="Normal" FontSize="25">
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="Black" Offset="0" />
                    <GradientStop Color="#FF71FF00" Offset="1" />
        <Label Height="36" Content="Enter Text for Speech" HorizontalAlignment="Left" Margin="87,89,0,0" Name="label2" VerticalAlignment="Top" Width="191" FontFamily="Shruti" FontWeight="Bold" FontSize="18" />
        <TextBox Height="23" HorizontalAlignment="Left" Margin="300,97,0,0" Name="textBox1" VerticalAlignment="Top" Width="203" />
        <Button Content="Start Voice" Height="35" HorizontalAlignment="Left" Margin="246,160,0,0" Name="button1" VerticalAlignment="Top" Width="89" Foreground="#FFECDADA" FontFamily="Times New Roman" FontSize="18" Click="button1_Click">
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="Black" Offset="0" />
                    <GradientStop Color="#FF36FF00" Offset="1" />


Code .cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Speech.Synthesis;// Add speech namespace in application
namespace ReportWPF
    public partial class Window5 : Window
        public Window5()
        private void button1_Click(object sender, RoutedEventArgs e)
            SpeechSynthesizer synthesizer = new SpeechSynthesizer();//create insatnce of SpeechSynthesizer class
            PromptBuilder promptBuilder = new PromptBuilder();//create insatnce of PromptBuilder class
            promptBuilder.AppendText(textBox1.Text);//AppendText is a method of PromptBuilder class that is parameterized that take string value
            synthesizer.SpeakAsync(promptBuilder);//SpeakAsync is a method of SpeechSynthesizer class that is parameterized that take object of PromptBuilder class


Screen Shot: 

In below screen shot I have entered some text in textbox than I clicked on button system narrator will narrate all text in given textbox.

Example of SpeechSynthesizer class in WPF



  Modified On Sep-07-2019 12:12:26 AM

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