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

class MainClass {
    public static void Main() {
        using (OleDbConnection con = new OleDbConnection()) {
            con.ConnectionString = "Provider=SQLOLEDB;" +     
                @"Data Source=.sqlexpress;" + 
                "Initial Catalog=Northwind;" + 
                "Integrated Security=SSPI";    

            con.Open();

            if (con.State == ConnectionState.Open) {
                Console.WriteLine("  Connection String = " +
                    con.ConnectionString);
            } else {
                Console.WriteLine("OleDbConnection failed to open.");
                Console.WriteLine("  Connection State = " + con.State);
            }
        }
    }
}

    

   
 

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

class MainClass {
    public static void Main() {
        using (OleDbConnection con = new OleDbConnection()) {
            con.ConnectionString = "Provider=SQLOLEDB;" +     
                @"Data Source=.sqlexpress;" + 
                "Initial Catalog=Northwind;" + 
                "Integrated Security=SSPI";    

            con.Open();

            if (con.State == ConnectionState.Open) {
                Console.WriteLine("  Connection State = " + con.State);
            } else {
                Console.WriteLine("OleDbConnection failed to open.");
                Console.WriteLine("  Connection State = " + con.State);
            }
        }
    }
}

    

   
 

using System;
using System.Diagnostics;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.OleDb;

public class MainClass {
    static void Main() {
        try {
            OleDbConnection cnOleDb = new OleDbConnection("Provider=SQLOLEDB.1;Password=pw;Persist Security Info=False;User ID=admin;Initial Catalog=biblio;Data Source=betav9;Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=BETAV9;Use Encryption for Data=False;Tag with column collation when possible=False");
            cnOleDb.Open();
        } catch (OleDbException exOleDb) {
            MessageBox.Show(exOleDb.Message);
        } catch (Exception ex) {
            MessageBox.Show(ex.Message); 
        }
    }
}

    

   


using System;
using System.Data.OleDb;

public class ReadFromOleDb
{
  [STAThread]
  static void Main(string[] args)
  {
    String sConn = "provider=sqloledb;server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
    
    String sSQL = "select id, firstname, lastname from Employee";

    OleDbConnection oConn = new OleDbConnection(sConn);
    oConn.Open();

    OleDbCommand oCmd = new OleDbCommand(sSQL, oConn);
    OleDbDataReader oReader = oCmd.ExecuteReader();

    int idxID = oReader.GetOrdinal("id");
    int idxFirstName = oReader.GetOrdinal("firstname");
    int idxLastName = oReader.GetOrdinal("lastname");

    while(oReader.Read()) {
      Console.WriteLine("{0} {1} {2}",
        oReader.GetValue(idxID),
        oReader.GetValue(idxFirstName),
        oReader.GetValue(idxLastName));
    }
  }
}


           
          

   


using System;
using System.Data;
using System.Data.OleDb;

class AccessConnect {
   static void Main() 
   {
      string connString = @"provider = microsoft.jet.oledb.4.0;data source = Employee.mdb;";

      OleDbConnection conn = new OleDbConnection(connString);

      try 
      {
         conn.Open();
         Console.WriteLine("Connection opened.");

         Console.WriteLine("Connection Properties:");   
         Console.WriteLine("	Connection String: {0}", conn.ConnectionString);    
         Console.WriteLine("	Database: {0}",conn.Database);   
         Console.WriteLine("	DataSource: {0}",conn.DataSource);
         Console.WriteLine("	ServerVersion: {0}", conn.ServerVersion);
         Console.WriteLine("	State: {0}", conn.State);
      } catch (OleDbException e) {
         Console.WriteLine("Error: " + e);  
      } finally  {
         conn.Close();
         Console.WriteLine("Connection closed.");
      }
   }
}


           
          

   

using System;
using System.Data;
using System.Data.OleDb;

public class Prepare {    
 public static void Main () { 
   String connect = "Provider=Microsoft.JET.OLEDB.4.0;data source=.Employee.mdb";
   OleDbConnection con = new OleDbConnection(connect);
   con.Open();  
   Console.WriteLine("Made the connection to the database");

   OleDbCommand cmd1 = con.CreateCommand();
   cmd1.CommandText = "SELECT ID FROM Employee "
                    + "WHERE id BETWEEN ? AND ?";
   OleDbParameter p1 = new OleDbParameter();
   OleDbParameter p2 = new OleDbParameter();
   cmd1.Parameters.Add(p1);
   cmd1.Parameters.Add(p2);
   p1.Value = "01";
   p2.Value = "03";
   OleDbDataReader reader = cmd1.ExecuteReader();
   while(reader.Read()) 
     Console.WriteLine("{0}", reader.GetInt32(0));
   reader.Close();
   con.Close();
 }
}


           
          

   

using System;
using System.Data;
using System.Data.OleDb;

public class Create {    
 public static void Main () { 
   String connect = "Provider=Microsoft.JET.OLEDB.4.0;data source=.Employee.mdb";
   OleDbConnection con = new OleDbConnection(connect);
   con.Open();
   OleDbCommand cmd = con.CreateCommand();

   cmd.CommandText = "CREATE TABLE Customer (CustomerID "
       + "CHAR(4), CustomerName VARCHAR(25), Address "
       + "VARCHAR(25), BalanceDue DECIMAL)";
   cmd.ExecuteNonQuery();
   cmd.CommandText = "INSERT INTO Customer VALUES (1234,'F F','22 First St.',67.00)";
   cmd.ExecuteNonQuery();
   cmd.CommandText = "INSERT INTO Customer VALUES (5678,'D D','33 Second St.',130.95)";
   cmd.ExecuteNonQuery();
   cmd.CommandText = "INSERT INTO Customer VALUES (4321,'M M','44 Third St.',0)";
   cmd.ExecuteNonQuery();
   cmd.CommandText = "INSERT INTO Customer VALUES (8765,'C C','55 Fourth St.', 0)";
   cmd.ExecuteNonQuery();

   con.Close();
 }
}