Implementing the Find Function in Sample Notepad using C#

For Previous tutorial
http://futurextech.blogspot.com/2013/12/creating-sample-notepad-application.html

Find

Create another web form which will pop on clicking find Menuitem.

namespace Notepad_X

{

    public partial class Find : Form

    { 

        public Find()

        {

            InitializeComponent();

        }

//cancel button

        private void button2_Click(object sender, EventArgs e)

        {

            this.Close();

        }

//find next button

        private void button1_Click(object sender, EventArgs e)

        {

            Functions.TextToFind = textBox1.Text;

            

            this.Close();

        }

        private void Find_Load(object sender, EventArgs e)

        {

            if (Functions.TextToFind != null)

                textBox1.Text = Functions.TextToFind;

        }

    }

 }

---------------------------------------------------------------------------------------------

Now Add > New Item >Code file

Name this file as Functions.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Notepad_X

{

    static  class Functions

    {

        public static string TextToFind { get; set; }

    }

}

Now Add the following method in main form (In our example Form1.cs)

private void Find(string textToFind, ref Find findForm)

        {

            //If there isn't found the text specified

            if (txtcontent.Text.IndexOf(textToFind) == -1)

            {

                //Show a message to the user

                MessageBox.Show("Cannot find '" + textToFind + " '");

                //And show the dialog again

                findForm.ShowDialog();

            }

            else

            {

                //If it is found

                //Put the cursor at the start of it

                txtcontent.SelectionStart = txtcontent.Text.IndexOf(Functions.TextToFind);

                //And select it

                txtcontent.SelectionLength = textToFind.Length;

            }

        }

-----------------------------------------------------------------

For Clicking Find Menu Item In main form (Form1.cs)

private void findCtrlFToolStripMenuItem_Click(object sender, EventArgs e)

        {

            Find findForm = new Find();

            //Show the find dialog

            findForm.ShowDialog();

            Find(Functions.TextToFind, ref findForm);

           

        }