Csharp/CSharp Tutorial/ADO.Net/ODBC

Connecting to an ODBC Data Source

using System;
using System.Data.Odbc;
    class Program
    {
        static void Main(string[] args)
        {
            string odbcConnectString = "DRIVER={SQL Server};SERVER=(local);" +
                "DATABASE=AdventureWorks;Trusted_Connection=yes;";
            string sqlSelect = "SELECT TOP 5 Title, FirstName, LastName FROM Person.Contact";
            using (OdbcConnection connection =new OdbcConnection(odbcConnectString))
            {
                OdbcCommand command = new OdbcCommand(sqlSelect, connection);
                connection.Open(  );
                OdbcDataReader reader = command.ExecuteReader(  );
                while (reader.Read(  ))
                    Console.WriteLine("{0} {1}", reader[0], reader[1]);
            }
       }
    }

Connecting to a Text File

using System;
using System.Data;
using System.Data.OleDb;
    class Program
    {
        static void Main(string[] args)
        {
            string connectString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=;Extended Properties=\"text;HDR=yes;FMT=Delimited\";";
            OleDbConnection connection = new OleDbConnection(connectString);
            connection.Open(  );
            Console.WriteLine("Connection.String = {0}\n",connectString);
            Console.WriteLine("Connection.State = {0}",connection.State);
            Console.WriteLine("Connection.Provider = {0}",connection.Provider);
            Console.WriteLine("Connection.ServerVersion = {0}",connection.ServerVersion);
            connection.Close(  );
        }
    }

Connect to SqlServer using OdbcConnection

using System;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Data.Odbc;

    class Program
    {
        static void Main(string[] args)
        {
            string odbcConnectString = "Driver={SQL Native Client};" +
                "Server=(local);Database=AdventureWorks;uid=sa;pwd=password;";
            using (OdbcConnection connection =new OdbcConnection(odbcConnectString))
            {
                connection.Open(  );
                Console.WriteLine("ConnectionString = {0}\n", odbcConnectString);
                Console.WriteLine("State = {0}", connection.State);
                Console.WriteLine("DataSource = {0}", connection.DataSource);
                Console.WriteLine("ServerVersion = {0}", connection.ServerVersion);
            }
        }
    }

Creating Connection To ODBC

using System;
using System.Data.Odbc;
class MainClass
{
  static void Main(string[] args)
  {
    OdbcConnection MyConnection = new OdbcConnection("DRIVER={MySQL};SERVER=TESTSRV;DATABASE=MyDatabase;UID=root;PWD=\"\"");
    MyConnection.Open();      
  }
}

Odbc Provider

using System;
using System.Data;
using System.Data.Odbc;
    class OdbcProvider
    {
        static void Main(string[] args)
        {
            string connString = @"dsn=northwindodbc";
            string sql = @"select * from employees";
            OdbcConnection conn = null;
            OdbcDataReader reader = null;
            try
            {
                conn = new OdbcConnection(connString);
                conn.Open();
                OdbcCommand cmd = new OdbcCommand(sql, conn);
                reader = cmd.ExecuteReader();
                while (reader.Read())
                {
                    Console.WriteLine("{0} | {1}"
                     , reader["FirstName"].ToString().PadLeft(10)
                     , reader[1].ToString().PadLeft(10)
                    );
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("Error: " + e);
            }
            finally
            {
                reader.Close();
                conn.Close();
            } 
        }
    }