using System;
using System.Net;
using System.Text;
using CoreLab.MySql;
using System.Data.Odbc;
using MySql.Data.MySqlClient;
class ConnectMySql
{
      public void Connect_CoreLab()
      {
            string constr = "User Id=root;Host=localhost;Database=qing;password=qing";
            MySqlConnection mycn = new MySqlConnection(constr);
            mycn.Open();
            MySqlCommand mycm = new MySqlCommand("select * from shop",mycn);
            MySqlDataReader msdr = mycm.ExecuteReader();
            while(msdr.Read())
            {
                  if (msdr.HasRows)
                  {
                        Console.WriteLine(msdr.GetString(0));
                  }
            }
            msdr.Close();
            mycn.Close();
      }
      public void Connect_Odbc()
      {
            //string MyConString ="DSN=MySQL;UID=root;PWD=qing";
      string MyConString = "DRIVER={MySQL ODBC 3.51 Driver};" +
            "SERVER=localhost;" +
            "DATABASE=test;" +
            "UID=root;" +
            "PASSWORD=qing;" +
            "OPTION=3";
            OdbcConnection MyConn = new OdbcConnection(MyConString);
            MyConn.Open();
            OdbcCommand mycm = new OdbcCommand("select * from hello",MyConn);
            OdbcDataReader msdr = mycm.ExecuteReader();
            while(msdr.Read())
            {
                  if (msdr.HasRows)
                  {
                        Console.WriteLine(msdr.GetString(0));
                  }
            }
            msdr.Close();
            MyConn.Close();
      }
      public void Connect_Net()
      {
            string myConnectionString = "Database=test;Data Source=localhost;User Id=root;Password=qing";
            MySqlConnection mycn = new MySqlConnection(myConnectionString);
            mycn.Open();
            MySqlCommand mycm = new MySqlCommand("select * from hello",mycn);
            MySqlDataReader msdr = mycm.ExecuteReader();
            while(msdr.Read())
            {
                  if (msdr.HasRows)
                  {
                        Console.WriteLine(msdr.GetString(0));
                  }
            }
            msdr.Close();
            mycn.Close();
      }
      public static void Main()
      {
            ConnectMySql ms = new ConnectMySql();
            ms.Connect_CoreLab();
            ms.Connect_Odbc();
            Connect_Net();
      }
}

--转自