public DataSet GetDataSetFromAdapter(
    DataSet dataSet, string connectionString, string queryString)
{
    using (OdbcConnection connection = 
               new OdbcConnection(connectionString))
    {
        OdbcDataAdapter adapter = 
            new OdbcDataAdapter(queryString, connection);

        // Open the connection and fill the DataSet.
        try
        {
            connection.Open();
            adapter.Fill(dataSet);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        // The connection is automatically closed when the
        // code exits the using block.
    }
    return dataSet;
}

//引入命名空间
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.Odbc;

public class MainClass : System.Windows.Forms.Form
{
  private System.Windows.Forms.DataGrid dataGrid1;

  public MainClass()
  {
    InitializeComponent();
  }
  private void InitializeComponent()
  {
    this.dataGrid1 = new System.Windows.Forms.DataGrid();
    ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
    this.SuspendLayout();

    this.dataGrid1.DataMember = "";
    this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
    this.dataGrid1.Location = new System.Drawing.Point(0, 8);
    this.dataGrid1.Size = new System.Drawing.Size(376, 288);
    this.dataGrid1.TabIndex = 0;

    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(384, 302);
    this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                    this.dataGrid1});
    this.Load += new System.EventHandler(this.MainClass_Load);
    ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
    this.ResumeLayout(false);

  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new MainClass());
  }

  private void MainClass_Load(object sender, System.EventArgs e)
  {
    string connectionString = @"Driver={MySQL};SERVER=localhost;DATABASE=NorthwindMySQL;";

    OdbcConnection conn= new OdbcConnection(connectionString);
    conn.Open();

    OdbcDataAdapter da = new OdbcDataAdapter ("SELECT CustomerID, ContactName, ContactTitle FROM Customers", conn);            

    DataSet ds = new DataSet("Cust");     
    da.Fill(ds, "Customers");

    dataGrid1.DataSource = ds.DefaultViewManager;
    conn.Close();
  }
}