CommandReader : SqlCommand Select « ADO.Net « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. ADO.Net
3. SqlCommand Select

using System;
using System.Data;
using System.Data.SqlClient;

    class CommandReader
    {
        static void Main()
        {
            SqlConnection conn = new SqlConnection(@"server = .\sqlexpress;integrated security = true;database = northwind");
            string sql = @"select firstname,lastname from employees";
            SqlCommand cmd = new SqlCommand(sql, conn);
            Console.WriteLine("Command created and connected.");
            try
            {
                conn.Open();
                SqlDataReader rdr = cmd.ExecuteReader();
                while (rdr.Read())
                {
                    Console.WriteLine("Employee name: {0} {1}",
                       rdr.GetValue(0),
                       rdr.GetValue(1)
                    );
                }
            }
            catch (SqlException ex)
            {
                Console.WriteLine(ex.ToString());
            }
            finally
            {
                conn.Close();
                Console.WriteLine("Connection Closed.");
            } 
        }
    }