programming question

Posted by shivam on Stack Overflow See other posts from Stack Overflow or by shivam
Published on 2011-06-28T05:39:49Z Indexed on 2011/06/28 8:22 UTC
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using System;
using System.Data;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;


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

        private void button1_Click(object sender, EventArgs e)
        {
            string connectString = @"Data Source=MOON\SQL2005;Initial Catalog=databaseA;Integrated Security=True";
            using (var srcCon = new SqlConnection(connectString))          //connection to source table
            {
                srcCon.Open();//source table connection open
                SqlCommand cmd = new SqlCommand();// sqlobject for source table
                cmd.Connection = srcCon;
                string connectionString = @"Data Source=MOON\SQL2005;Initial Catalog=databaseB;Integrated Security=True";
                using (var tgtCon = new SqlConnection(connectionString)) //connection to target table
                {
                    tgtCon.Open();         //target table connection open

                    SqlCommand objcmd1 = new SqlCommand();//sqlobject for target table
                    objcmd1.Connection = tgtCon;
                    objcmd1.CommandText = "SELECT MAX(date)  FROM Table_2";        //query to findout the max date from target table
                    var maxdate = objcmd1.ExecuteScalar();       // store the value of max date into the variable maxdate

                    cmd.CommandText = string.Format("SELECT id,date,name,city,salary,region FROM Table_1 where date >'{0}'", maxdate);    //select query to fetch rows from source table
                    using (var reader = cmd.ExecuteReader())
                    {

                        SqlCommand objcmd = new SqlCommand();
                        objcmd.Connection = tgtCon;

                        objcmd.CommandText = "INSERT INTO Table_2(id,date,name,city,salary,region)VALUES(@id,@date,@name,@city,@salary,@region)";
                        objcmd.Parameters.Add("@id", SqlDbType.Int);
                        objcmd.Parameters.Add("@date", SqlDbType.DateTime);
                        objcmd.Parameters.Add("@name", SqlDbType.NVarChar);
                        objcmd.Parameters.Add("@city", SqlDbType.NVarChar);
                        objcmd.Parameters.Add("@salary", SqlDbType.Int);
                        objcmd.Parameters.Add("@region", SqlDbType.Char);
                        while (reader.Read())
                        {

                           var order1 = reader[0].ToString();
                           var order2 = reader[1].ToString();
                           var order3 = reader[2].ToString();
                           var order4 = reader[3].ToString();
                           var order5 = reader[4].ToString();
                           var order6 = reader[5].ToString();
                           objcmd.Parameters["@id"].Value = order1;
                           objcmd.Parameters["@date"].Value = order2;
                           objcmd.Parameters["@name"].Value = order3;
                           objcmd.Parameters["@city"].Value = order4;
                           objcmd.Parameters["@salary"].Value = order5;
                           objcmd.Parameters["@region"].Value = order6;
                           objcmd.ExecuteNonQuery();
                        }
                    }
                    tgtCon.Close();
                }
                srcCon.Close();
             }

        }


    }
}

how can i organize the above written code in an efficient way?

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