How to Populate Data from Textbox to Datagridview in C#/CSharp

The following example allows you to populate data from a TextBox to DataGridView Control in C#/CSharp.

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace TextBoxToDataGridView
{


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

        private void Form1_Load(object sender, EventArgs e)
        {
            
            DataGridView dgv = this.dataGridView1;

            //SET DATAGRIDVIEW PROPERTIES
            dgv.AutoGenerateColumns = false;
            dgv.AllowUserToAddRows = false;
            dgv.RowHeadersVisible = false;
            dgv.MultiSelect = false;

            //SETS UP THE COLUMN HEADERS
            dgv.Columns.Add("FName", "First Name");
            dgv.Columns.Add("LName", "Last Name");
            dgv.Columns.Add("Age", "Age");
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            DataGridView dgv = this.dataGridView1;

            //ADDS NEW DATAGRIDVIEW ROW
            dgv.Rows.Add(txtFirstName.Text.ToString());

            //ADDS THE SUBITEMS OF THE CURRENTLY ADDED ROW
            dgv.Rows[dgv.Rows.Count - 1].Cells[1].Value = txtLastName.Text.ToString();
            dgv.Rows[dgv.Rows.Count - 1].Cells[2].Value = Convert.ToInt16(txtAge.Text);

            //SELECT THE LAST ROW OF THE DATAGRIDVIEW
            dgv.Rows[dgv.Rows.Count - 1].Selected = true;
        }
    }
 
}