Csharp/CSharp Tutorial/ADO.Net/OdbcConnection

OdbcConnection for Access mdb file

using System;
using Microsoft.Data.Odbc;
class MainClass
{
    static void Main(string[] args)
    {
        string connectionString  = @"Driver={Microsoft Access Driver (*.mdb)};DBQ=c:\Northwind.mdb";
        string SQL = "SELECT * FROM Orders";
        OdbcConnection  conn = new OdbcConnection(connectionString);
    
        OdbcCommand cmd = new OdbcCommand(SQL);
        cmd.Connection = conn;
        conn.Open();
        OdbcDataReader reader = cmd.ExecuteReader();
        while (reader.Read()) 
        {
            Console.Write("OrderID:"+reader.GetInt32(0).ToString() );
            Console.Write(" ,");
            Console.WriteLine("Customer:" + reader.GetString(1).ToString() );
        }
        reader.Close();
        conn.Close();
    }
}

Use ODBC Data Provider

using System;
using System.Data;
using System.Data.Odbc;
class MainClass
{
   static void Main(string[] args)
   {
      string connString = @"dsn=northwindodbc";
      string sql = @"select * from employee";
      OdbcConnection conn = null;
      OdbcDataReader reader = null;
      try
      {
         conn = new OdbcConnection(connString);
         conn.Open();
         OdbcCommand cmd = new OdbcCommand(sql, conn);
         reader = cmd.ExecuteReader();
         Console.WriteLine("Querying database {0} with query {1}\n", conn.Database, cmd.rumandText );
         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();
      }
   }
}