Voice Recognition - Visual Studio

Let us study voice recognition using visual studio.

• Open visual studio > New Project > Visual C# > Windows Form Application > OK
• Now a new project is started
• Go to solution explorer > right click reference > add reference > in .NET tab select “System.Speech” > OK
• Now Design the form as shown in the picture and name it as Below
• Right click on the form design > view code > copy the code as shown in video below.

Form Design :-

Source code :-

using System;

using System.Windows.Forms;

using System.Speech;

using System.Speech.Synthesis;

using System.Speech.Recognition;

using System.Diagnostics;

namespace voice_recognition // your project name. be care while copying.

{

    public partial class Form1 : Form

    {

        SpeechSynthesizer speechsynth = new SpeechSynthesizer();

        SpeechRecognitionEngine receng = new SpeechRecognitionEngine();

        Choices choice = new Choices();

        public Form1()

        {

            InitializeComponent();

        }

        private void startbtn_Click(object sender, EventArgs e)

        {

            startbtn.Enabled = false;

            stopbtn.Enabled = true;

            choice.Add(new string[] { "hello", "how are you", "what is the current time", "open blog", "thank you", "close" });

            Grammar gr = new Grammar(new GrammarBuilder(choice));

            try

            {

                receng.RequestRecognizerUpdate();

                receng.LoadGrammar(gr);

                receng.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(receng_SpeechRecognized);

                receng.SetInputToDefaultAudioDevice();

                receng.RecognizeAsync(RecognizeMode.Multiple);

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.Message, "Error");

            }

        }

        void receng_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)

        {

            switch (e.Result.Text.ToString())

            {

                case "hello":

                    speechsynth.SpeakAsync("hai user");

                    break;

                case "how are you":

                    speechsynth.SpeakAsync("iam fine. what about you");

                    break;

                case "what is the current time":

                    speechsynth.SpeakAsync("right now it is " + DateTime.Now.ToLongTimeString());

                    break;

                case "thank you":

                    speechsynth.SpeakAsync("well. same to you");

                    break;

                case "open blog":

                    Process.Start("chrome", "http://homotrick.blogspot.in");

                    break;

                case "close":

                    speechsynth.Speak("see you later. bye bye");

                    Application.Exit();

                    break;

            }

            list1.Items.Add(e.Result.Text.ToString());

        }

        private void stopbtn_Click(object sender, EventArgs e)

        {

            receng.RecognizeAsyncStop();

            startbtn.Enabled = true;

            stopbtn.Enabled = false;

        }

    }

}

Video :-

Keyboard Short cuts with in a Form - C#

Here we teach you how to make an windows form application with some keyboard short cuts that works with in that form only.

• Open visual studio > Make a new windows form application in C# with name "form keybord shortcut" > OK
• Then design the form as shown in the picture below.

Form Design :-

Source code :-

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;

namespace form_keybord_shortcut   //your project name. be care while copying.

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)

        {

            listBox1.Items.Add(keyData.ToString());

            if (keyData.ToString() == "F1, Control, Alt")

                button1_Click(null, null);

            return base.ProcessCmdKey(ref msg, keyData);

        }

        private void button1_Click(object sender, EventArgs e)

        {

            label1.Text = "Pressed";

        }

    }

}

Video :-