Simple example illustrating use of ADO.NET in windows form

Fig1: Scr Shot of sample table in SQL DB 
Fig2:Scr shot of data being displayed from DB using a windows form
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;
using System.Data.SqlClient;

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

        private void btnGetData_Click(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection();
            // Create a connection object
con.ConnectionString = @"Data source=USERS35\SQLExpress;initial catalog = training1;integrated security =true";
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = con;
cmd.CommandText = "select empid,empfname,emplname,emploc,empsal from employee";
            //0     1       2       3       4
            try
            {
                con.Open();//establishes phy link between App and DB
                SqlDataReader dr = cmd.ExecuteReader();
                dr.Read();//Reads one row from employee
                txtEmpId.Text = dr["empid"].ToString();
                txtFirstName.Text = dr["empfname"].ToString();
                txtLastName.Text = dr["emplname"].ToString();
                txtloc.Text = dr["emploc"].ToString();
                txtSal.Text = dr["empsal"].ToString();
                dr.Close();
            }
            catch (SqlException ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                if (con.State == ConnectionState.Open)
                {
                    con.Close();
                }
            }


        }
    }
}