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How to handle - A first chance exception of type 'System.InvalidOperationException' occurred in System.Speech.dll ? RRS feed

  • Question

  • Hello friends,

    I am in a big trouble .I m building an application which use speech Recoginiztion. I m getting  "A first chance exception of type 'System.InvalidOperationException' occurred in System.Speech.dll" Exception and noting is recognized pls help me My Code is

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.Speech.Recognition;
    using System.Speech.Synthesis;
    using System.Threading;

    namespace Text_To_Speech
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }

            SpeechSynthesizer sSynth = new SpeechSynthesizer();
            SpeechRecognitionEngine sRecoEng = new SpeechRecognitionEngine();
            PromptBuilder pBuild = new PromptBuilder();

            private void Form1_Load(object sender, EventArgs e)
            {

            }

            private void button1_Click(object sender, EventArgs e)
            {
                pBuild.ClearContent();
                pBuild.AppendText(textBox1.Text.ToString());
                sSynth.Speak(pBuild);
            }

            private void button2_Click(object sender, EventArgs e)
            {
                button2.Enabled = false;
                Choices GoodOne = new Choices();
                GoodOne.Add(new String[] { "Hello", "Up", "Down", "Good Morning", "Computer" });
                
                try
                {
                    Grammar Gra = new Grammar(new GrammarBuilder(GoodOne));
                    sRecoEng.RequestRecognizerUpdate();
                    sRecoEng.LoadGrammar(Gra);
                    sRecoEng.SpeechRecognized += sRecoEng_SpeechRecognized;
                    sRecoEng.SetInputToDefaultAudioDevice();
                    sRecoEng.RecognizeAsync(RecognizeMode.Multiple);
                    sRecoEng.Dispose();

                }
                catch
                {
                    return;
                }
            }

            void sRecoEng_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
            {
                MessageBox.Show(e.Result.Text.ToString());
            }
        }
    }
     
    Saturday, October 12, 2013 6:20 PM

All replies

  • Check exception message and error code.
    Wednesday, April 8, 2015 10:07 AM