Mapping .NET Data Provider Data Types to .NET Framework Data Types by converting : SqlDataReader « ADO.Net « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. ADO.Net
3. SqlDataReader

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

    class Program
    {
        static void Main(string[] args)
        {
            string sqlConnectString = "Data Source=(local);Integrated security=SSPI;Initial Catalog=AdventureWorks;";

            string sqlSelect = "SELECT TOP 5 ContactID, FirstName, MiddleName, LastName FROM Person.Contact";

            SqlConnection connection = new SqlConnection(sqlConnectString);
            SqlCommand command = new SqlCommand(sqlSelect, connection);

            connection.Open();

            using (SqlDataReader dr = command.ExecuteReader())
            {
                while (dr.Read())
                {
                    int contactID = Convert.ToInt32(dr[0]);
                    String firstName = Convert.ToString(dr[1]);
                    String middleName = Convert.ToString(dr[2]);
                    String lastName = Convert.ToString(dr[3]);

                    Console.WriteLine("{0}\t{1}, {2} {3}",contactID, lastName, firstName, middleName);
                }
            }

        }
    }