using System;
using System.Data;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Drawing;
 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        SqlDataAdapter pagingAdapter;
        DataSet pagingDS;
        int scrollVal;
 
        public Form1()
        {
            InitializeComponent();
            scrollVal = 0;
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            string connectionString = "Data Source=.;Initial Catalog=pubs;Integrated Security=True";
            string sql = "SELECT * FROM Authors";
            SqlConnection connection = new SqlConnection(connectionString);
            pagingAdapter = new SqlDataAdapter(sql, connection);
            pagingDS = new DataSet();
            connection.Open();
            pagingAdapter.Fill(pagingDS, scrollVal, 5, "Authors_table");
            connection.Close();
            dataGridView1.DataSource = pagingDS;
            dataGridView1.DataMember = "Authors_table";
        }
 
        private void button2_Click(object sender, EventArgs e)
        {
            scrollVal = scrollVal - 5;
            if (scrollVal < = 0)
            {
                scrollVal = 0;
            }
            pagingDS.Clear();
            pagingAdapter.Fill(pagingDS, scrollVal, 5, "authors_table");
        }
 
        private void button3_Click(object sender, EventArgs e)
        {
            scrollVal = scrollVal + 5;
            if (scrollVal > 23)
            {
                scrollVal = 18;
            }
            pagingDS.Clear();
            pagingAdapter.Fill(pagingDS, scrollVal, 5, "authors_table");
        }
    }
}