Sunday, 11 May 2014

Search_Highlight text in TextBox or richTextBox in window application


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Here i will explain how to use Search_Highlight text in TextBox or richTextBox in window application.

Step(1): Form
Drag and down a TextBox and a button (Search).
Step(1): Code
Double click on Search Button and write this code.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

using System.Text;

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

private void Button1_click(object sender, EventArgs e)
{
Stream mystream;
OpenFileDialog openfile = new OpenFileDialog ();

if(openfile .ShowDialog() ==System.Window.Forms.DialogResult.OK)
{
if((mystream = openfile .OpenFile() ) ! = null)
string strfilename = openfile .FileName;

String filetext = File.ReadAllText(strfilename);
richTextBox1.text  = filetext;
}


private void Search_btn_click(object sender, EventArgs e)
{
//Searches the text in a RichTextbox control for a string within a range of text Within.

richTextBox1.text.Find(textBox1.Text , index , richTextBox1.TextLength, RichTextBoxFinds.None);
//Selection Colour

richTextBox1.selectionBackColour = Color.Red;

//After a match is found the index is increased so the search won't stop at the same name.
 index = tichTextBox1.Text.IndexOf(textBox1.Text , index) +1;
}

}

Step(3): Run
Now run your application and put a text in textBox and click on search button.


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