using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string connetionString = null;
            SqlConnection connection ;
            SqlDataAdapter adapter ;
            SqlCommandBuilder cmdBuilder ;
            DataSet ds = new DataSet();
            string sql = null;
            Int32 i ;

            connetionString = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=Password";
            connection = new SqlConnection(connetionString);
            sql = "select * from Product";
            try
            {
                connection.Open();
                adapter = new SqlDataAdapter(sql, connection);
                cmdBuilder = new SqlCommandBuilder(adapter);
                adapter.Fill(ds);
                for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
                {
                    ds.Tables[0].Rows[i].ItemArray[2] = Convert.ToInt32 (ds.Tables[0].Rows[i].ItemArray[2]) + 100;
                }
                adapter.Update(ds.Tables[0]);
                connection.Close();
                MessageBox.Show ("Data updated ! ");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            } 

        }
    }
}