How to insert the data from TextBox to dataGridview in C#.net in Realtime

In RealTime most of the windows based applications are used dataGridview for Inserting,Deleting,for any Modifications we use dataGridview .So for that the data will send to dataGridview from TextBox. I  gave some code for that shown below.
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;
using System.Data.SqlClient;
namespace gridview
{
    public partial class Form1 : Form
    {  
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            DataRow dr;           
            dt.Columns.Add("Column1");
            dt.Columns.Add("Column2");
            dt.Columns.Add("Column3");
            dr = dt.NewRow();
            dr["column1"] = textBox1.Text;
            dr["column2"] = textBox2.Text;
            dr["column3"] = textBox3.Text;
            dt.Rows.Add(dr);
            dataGridView1.DataSource = dt;          
        }
    }
}

                  Below image shows form with TextBoxes and DataGridView.

Below image shows TextBoxes and Data inserted from TextBoxes to Datagridview.

I hope this code will help you.