Csharp/CSharp Tutorial/ADO.Net/ODBC

Connecting to an ODBC Data Source

<source lang="csharp">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]);
           }
      }
   }</source>

Connecting to a Text File

<source lang="csharp">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(  );
       }
   }</source>

Connect to SqlServer using OdbcConnection

<source lang="csharp">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);
           }
       }
   }</source>

Creating Connection To ODBC

<source lang="csharp">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();      
 }

}</source>

Odbc Provider

<source lang="csharp">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();
           } 
       }
   }</source>